New in MathWorld -- September 2026
Wednesday September 30, 2026
- Adjacent Vertices (modified)
- Christoffel Symbol of the Second Kind (modified)
- Covolume
- Crossed Dodecahedral Graph
- Crossed Elongated Square Gyrobicupola Graph
- Crossed Graph (modified)
- Crown Graph (modified)
- Cube-Connected Cycle Graph (modified)
- Cube-Full Number
- D_4 Lattice
- Devil's Curve (modified)
- Epstein Zeta Function (modified)
- Erdős Problems (modified)
- Fishburn Latent-Subset Conjecture
- Fundamental Parallelepiped
- Generalized Hypergraph 4-Cycle
- Goldberg Graph (modified)
- Graph Neighbor
- Grid Graph (modified)
- Invertible Matrix (modified)
- Irrational Number (modified)
- Metric Dimension (modified)
- Minimal Resolving Set
- Minimum Dominating Set (modified)
- Neighbor
- Neighboring Vertices
- Nonsingular Matrix (modified)
- Norine's Antipodal-Coloring Conjecture
- Parallelepiped (modified)
- Powerful Number (modified)
- Representation Number
- Riemann Zeta Function (modified)
- Square Packing (modified)
- Tensor Category (modified)
- Theta Series (modified)
- Word-Representable Graph
Tuesday September 29, 2026
- Antimagic Graph (modified)
- Average Consensus
- Average Consensus Problem
- Brace (modified)
- Central Configuration
- Dominating Hadwiger Conjecture
- Elongated Square Gyrobicupola (modified)
- Fabrici-Madaras Graphs
- Frustrated Parking Function
- Generalized Petersen Graph (modified)
- Goldberg Graph (modified)
- Gossip Algorithm
- Hadwiger Conjecture (modified)
- Honeycomb Toroidal Graph (modified)
- Inverse Relative Gain Array
- Lattice Covering Radius
- Moore Curve
- Osgood Curve
- Parking Function (modified)
- Peano Curve (modified)
- Pompeiu Conjecture
- Ponzo's Illusion (modified)
- Ramsey Number (modified)
- Schiffer Conjecture
- Set-Coloring Ramsey Number
- Space-Filling Function (modified)
- Terdragon
- Wunderlich Curve
Monday September 28, 2026
- Affine Dynkin Diagram
- Algebraically Dependent
- ANCOVA
- Anticanonical Bundle
- Bott Periodicity
- Chilakamarri Graphs (modified)
- Combinatorial Game
- Computer Algebra (modified)
- Concyclic Points
- Conormal Bundle
- Cuboctahedral Graph (modified)
- Cyclotomic Extension
- Eckart-Young Theorem
- Experimental Mathematics (modified)
- Generalized Extreme Value Distribution
- Generalized Petersen Graph (modified)
- Georges-Kelmans Graph (modified)
- Goldberg Graph (modified)
- Golden Ratio (modified)
- Group C^*-Algebra
- Hadamard Conjecture
- Halin Snark (modified)
- Inseparable Extension
- Inverse Discrete Fourier Transform
- Kepler Triangle (modified)
- Minimal Enclosing Circle (modified)
- Minimal Enclosing Circle Problem (modified)
- Minimum Spanning Forest
- Minkowski Difference
- Model Companion
- Model Completeness
- Möbius-Kantor Graph (modified)
- Noncomputable Function
- Noncomputable Number
- Normal Ordering (modified)
- One-Sided Chebyshev Inequality
- Pell Graph (modified)
- Pisot Number (modified)
- Plastic Constant (modified)
- Popcorn Function
- Prime Number Race
- Proof (modified)
- Pseudorandom Graph
- Quadratic Reciprocity
- Quadratic Reciprocity Law
- QZ Decomposition
- Reciprocal Proportion Triangle (modified)
- Reducible Variety
- Reverse Polish Expression
- Reverse Polish Notation (modified)
- Ring Automorphism
- Ring Endomorphism
- Ring Isomorphism
- Ring Monomorphism
- Rolling Polyhedron Graph (modified)
- RSA Cryptosystem
- RSA Encryption (modified)
- Schläfli Double Six Graph (modified)
- Self-Summing Ratio
- Semianalytic
- Semianalytic Set
- Smallest Circle Problem
- S-Polynomial
- Stable Marriage
- Stable Marriage Problem (modified)
- Stone Representation Theorem
- Subset Sum
- Subset Sum Problem (modified)
- Supergolden Ratio (modified)
- Superharmonic Function
- Superplastic Ratio
- Thomassen Graphs (modified)
- Triangle Dissection (modified)
- Weeks Space
Sunday September 27, 2026
- 2-Almost Prime
- 2x mod 1 Map (modified)
- 30-60-90 Triangle (modified)
- Absolute Geometry (modified)
- Accordion Graph (modified)
- Addition Chain (modified)
- Adjoint Functor
- AKS Test
- Algebraic Connectivity (modified)
- Almost Complex Structure
- Alternating Bilinear Form
- Ambiguity Function
- Analysis of Covariance
- Ancillary Statistic
- Angle Addition Identities
- Approximate Identity (modified)
- Arithmetic Complexity
- Associated Bundle
- Automatic Group
- Automatic Sequence
- Automorphic Form
- Baby Monster
- Baby Monster Group (modified)
- Banach Contraction Principle
- Banach Density (modified)
- Banach Fixed Point Theorem (modified)
- Bayes' Rule
- Bayes' Theorem (modified)
- Bernoulli Scheme
- Beta Distribution of the Second Kind
- Beta Prime Distribution (modified)
- Biadjacency Matrix
- Biclique
- Bimodule
- Binary Digit
- Binary Splitting
- Birkhoff-von Neumann Theorem
- Bit (modified)
- Bode Plot
- Boosting
- Borel Determinacy
- Borel Determinacy Theorem (modified)
- Borel Hierarchy (modified)
- Borel Subalgebra
- Borel Subgroup
- Bra-Ket Notation
- Branch and Bound
- Bruhat Order
- Brute Force Search
- Cairo Tessellation (modified)
- Cairo Tiling
- Cake Cutting Problem
- Calibrated Manifold
- Cartan Decomposition
- Cartan Subgroup
- Casson Invariant
- CG Method
- Chained Arrow Notation (modified)
- Chirikov-Taylor Map
- Choice Number
- Cholesky Decomposition (modified)
- Cholesky Factorization
- Church Numeral
- City Block Distance
- Closed Category
- Cochain Complex
- Cofinite Topology
- Cohomology Class
- Cohomology Group
- Column Matrix
- Column Vector (modified)
- Combinatorial Design
- Combinatorial Mathematics
- Combinatorics (modified)
- Complementary Graph
- Completing the Square (modified)
- Completion of the Square
- Conjugate Gradient
- Conjugate Gradient Method (modified)
- Connection
- Consistency Proof
- Constant Random Variable
- Constructive Solid Geometry
- Continuous Vector Bundle (modified)
- Continuum Hypothesis (modified)
- Continuum Theory
- Convergence Radius
- Conway's Chained-Arrow Notation
- Coset Space
- Costa Surface
- Covering Map (modified)
- Crossed Prism Graph (modified)
- Curvature Form
- Curve Fitting
- Cyclotomy
- d'Alembert's Criterion
- Decimal (modified)
- Decimal System
- Decision Procedure
- Decomposition Group
- Deformation Theory
- Del Pezzo Surface
- Denary
- Derived Functor
- Dimensionless Quantity
- Dimer Covering
- Dirac Notation (modified)
- Dirac Operator
- Dirichlet Beta
- Dirichlet Beta Function (modified)
- Dirichlet Distribution
- Dirichlet Function (modified)
- Discrete Logarithm Problem
- Discriminant Analysis
- Dolbeault Cohomology
- Dolbeault Operators
- Donaldson Theory
- Doubling Map
- Drinfeld Module
- Duffing Equation
- Eikonal Equation
- Einstein Manifold
- Einstein Summation Notation
- Elliptic Curve Factorization
- Elliptic Curve Factorization Method (modified)
- Equivariant Cohomology
- Erdős-Gyárfás Conjecture
- Erdős-Sós Theorem
- Essential Submodule
- Etale Space (modified)
- Euler Formula (modified)
- Euler Identity (modified)
- Evolutionary Programming
- Excluded Middle
- Exhaustive Search (modified)
- Expectation Value (modified)
- Extrapolation
- Fifteen Puzzle
- Fifth Postulate
- Figure Eight Knot (modified)
- Flower Graph (modified)
- Flower Snark (modified)
- Formal Group
- Foundation Axiom
- Fox Derivative
- Fréchet Derivative (modified)
- Fredholm Operator
- Free Abelian Group (modified)
- Free Algebra
- Freely (modified)
- Freudenthal Suspension Theorem
- Frobenius Reciprocity
- Full Subcategory
- Functional Derivative (modified)
- Fundamental Groupoid
- Gabor Function
- Galilean Transform
- Galilean Transformation (modified)
- Gauss Quadrature
- Generalized Continuum Hypothesis
- Generalized Eigenspace
- Generalized Petersen Graph (modified)
- Geometrical Progression
- Geometric Sequence (modified)
- Gram-Charlier A Series
- Gram-Charlier Series (modified)
- Graph Complement (modified)
- Graph Genus (modified)
- Great Circle Distance
- Griffiths' Conjecture
- Grothendieck Group
- Group Cohomology
- Group Homology
- Group Homomorphism (modified)
- Group Morphism
- Group Scheme
- Hard Lefschetz Theorem
- Harmonic Form
- Heaviside Step
- Heaviside Step Function (modified)
- Hecke Algebra
- Hensel Lifting
- Heptadecagon (modified)
- Hexadecimal (modified)
- Hexadecimal Notation
- Hexadecimal System
- Hilbert Scheme
- Hlawka's Inequality (modified)
- Hodge Diamond
- Hodge Laplacian
- Hodge Theory
- Holor
- Hom-Set (modified)
- Honeycomb Toroidal Graph (modified)
- Hurwitz Zeta
- Hurwitz Zeta Function (modified)
- Hydra and Hercules
- Hypersurface (modified)
- Idempotent Semigroup
- IEEE 754-2008 (modified)
- Implicit Equation
- Independent Random Variables
- Infinite Matrix
- Inside-Outside Theorem (modified)
- Integer Programming (modified)
- Inverse Gaussian
- Inverse Gaussian Distribution (modified)
- Invertible Link
- Isaacs Graph
- Isometry (modified)
- Isosurface
- Jacobi Triple Product Identity
- Jinc
- Kähler Potential (modified)
- Kolmogorov Extension Theorem
- Kronecker's Jugendtraum
- Kullback-Leibler Divergence
- Kummer Extension
- Lanczos Algorithm (modified)
- Lanczos Method
- Laplacian S_n,n Conjecture
- Latin Eulerian Number
- Law of Rare Events
- Law of the Excluded Middle (modified)
- Law of the Excluded Third
- Law of Total Probability
- Lévy Process
- Lie-Trotter Product Formula
- Linear System of Equations (modified)
- Line Search
- Listing Knot
- Local Field (modified)
- Locally Compact Group
- Logistic Regression
- Lorentz Transform
- Lorentz Transformation (modified)
- Lower Banach Density
- Lower Central Series
- LU Decomposition (modified)
- LU Factorization
- Macdonald Polynomial
- Manifold with Boundary
- Mark Space (modified)
- Markström Graph (modified)
- Mathematical Expectation
- Matroid Beta Invariant
- Matroid Intersection
- Maximal Torus
- Maxwell-Boltzmann Distribution
- Measurable Function (modified)
- Memoryless Property
- Merino-Welsh Conjecture
- Metaplectic Group
- Method of Variation of Parameters
- Metric Tensor (modified)
- Minimal Ideal
- Modular Curve
- Monomial Order (modified)
- Monomial Ordering
- Monotone Convergence Theorem (modified)
- Monotone Sequence Theorem (modified)
- Motive
- Moving Frame
- Multifractal
- Multiple Edge (modified)
- Multiplicative Partition
- Natural Log
- Natural Logarithm (modified)
- Neighborhood System
- Neutral Geometry
- Noncentral Distribution
- Nondegenerate Bilinear Form
- Nonlinear Programming
- Nonlinear Regression
- Nonstandard Integer
- Nonwandering Set
- Normal Ordering
- Normed Linear Space
- Normed Space (modified)
- Nuclear Operator
- Ockham Algebra
- Octahedron Covering
- Open Cluster
- Open Cover (modified)
- Open Covering
- Oracle
- Orbifold Notation
- Ordinary Least Squares
- Orientable Genus (modified)
- Orientable Graph Genus
- Ostrogradsky Theorem
- Paraboloidal Coordinates
- Parallel Edges
- Parallel Postulate (modified)
- Parallel Transport (modified)
- Parametric Curve
- Pascal's Triangle (modified)
- Perfect Code (modified)
- Permutable Prime
- Perverse Sheaf
- Petersburg Paradox
- Phi Coefficient
- Phylogenetic Network (modified)
- Plus or Minus Sign
- Poincaré Half-Plane Model (modified)
- Poisson Theorem (modified)
- Polar Vector (modified)
- Polycyclic Group
- Preconditioner
- Predicate Calculus (modified)
- Predicate Logic
- Premeasure (modified)
- Principle of Excluded Middle
- Principle of Indifference
- Principle of Induction
- Principle of Mathematical Induction (modified)
- Proca Equation
- Product Measure (modified)
- Proper Map
- Propositional Logic
- Pseudodifferential Operator
- Pseudovector (modified)
- Pushout
- Putnam Competition
- Putnam Mathematical Competition (modified)
- P Versus NP
- P Versus NP Problem (modified)
- P vs NP
- Pythagorean Theorem (modified)
- Quantitative Monsky Problem
- Quotient Set
- Radix Sort
- Random Polynomial (modified)
- Random Process
- Ratio Test (modified)
- Real Line (modified)
- Real Number Line
- Rectilinear Distance
- Reduced Totient Function
- Regular Homotopy
- Regular Polytope
- Regular Variation
- Repfigit
- Replacement Axiom
- Residue-Class Ring
- Riccati Differential Equation (modified)
- Riemannian Submersion
- Riesz Representation Theorem (modified)
- Ring Homomorphism (modified)
- Ring Morphism
- Roman Numeral System
- Rotational Symmetry (modified)
- Rotation Symmetry
- Saint Petersburg Paradox (modified)
- Schatten Norm
- Schur Decomposition (modified)
- Schur Factorization
- Schur Polynomial
- Schwarzian
- Second-Price Auction
- Semigroup Ring
- Septadecagon
- Sexagesimal (modified)
- Sexagesimal Notation
- Sexagesimal Number System
- sigma-Strong Operator Topology (modified)
- Simple Path (modified)
- Simple Random Walk
- Simultaneous Linear Equations
- Sine Wave
- Singular Cohomology
- Singular Homology (modified)
- Sinusoid (modified)
- SI Prefixes (modified)
- Smooth Curve (modified)
- Snubification
- Sobolev Embedding Theorem (modified)
- SOR Method
- Spearman Rank Correlation
- Spearman Rank Correlation Coefficient (modified)
- Special Linear Lie Algebra
- Spectral Theory
- Spherical Distance (modified)
- Spherical Symmetry
- Spin Group
- Standard Map (modified)
- Starfish Graph (modified)
- Stein Manifold
- Stiff Differential Equation
- Stochastic Approximation
- Stochastic Calculus
- Stochastic Process (modified)
- Sublinear Function
- Subsemigroup
- Successive Overrelaxation
- Successive Overrelaxation Method (modified)
- Supersingular Elliptic Curve
- Survival Function (modified)
- Survivor Function
- Symplectic Lie Algebra
- Tate Conjecture
- Taxicab Distance
- Taxicab Metric (modified)
- Tensor Field
- Theorem of Pythagoras
- Thomae Function (modified)
- Thom Transversality Theorem
- Tietze Graph (modified)
- Topological Field
- Topological Ordering
- Topological Ring
- Tor
- Total Probability Rule
- Total Probability Theorem (modified)
- Tower of Hanoi Puzzle
- Trapezium Rule
- Trapezoidal Rule (modified)
- Trapezoid Rule
- Triangle Dissection (modified)
- Triplex Graph (modified)
- Triply Periodic Minimal Surface
- Trivial Representation
- Trotter Product Formula (modified)
- Trotter's Formula
- Tschirnhausen Transformation (modified)
- Tschirnhaus Transform
- Twisted Isaacs Graph
- Unexpected Exam Paradox
- Unexpected Hanging Paradox (modified)
- Unifier
- Uniformization Theorem
- Uniformly Convex (modified)
- Unitary Transform
- Unitary Transformation (modified)
- Universal Mapping Property
- Universal Property (modified)
- Unordered Factorization (modified)
- Upper Banach Density
- Variational Derivative
- Variation of Constants
- Variation of Parameters (modified)
- Verma Module
- Vickrey Auction (modified)
- Volume Form
- Weak Homotopy Equivalence
- Weeks Manifold
- Weyl Chamber
- Weyl Character Formula
- Wiener Space
- Wigner Distribution
- Wirtinger's Inequality (modified)
- Wolf Space
- Woodbury Formula (modified)
- Woodbury's Identity
- Wreath Product
- Wythoff Construction
Saturday September 26, 2026
- Computable Function (modified)
- Coxeter Graph (modified)
- Davenport Constant (modified)
- Equivelar Map
- Equivelar Octahedron of Genus 3
- Erdős-Littlewood-Offord Inequality
- Euler Genus (modified)
- Exotic Sphere (modified)
- Gamma Distribution (modified)
- Genus (modified)
- Graph Crosscap Number
- Graph Genus (modified)
- Graph Toughness (modified)
- Integral Graph (modified)
- Klein Graphs (modified)
- Klein Map
- Klein Quartic (modified)
- Lovász Number (modified)
- Motzkin Sum Number
- Nonorientable Graph Genus
- Orientable Genus
- Paper Bag Problem
- Paper Bag Surface (modified)
- Poisson Distribution (modified)
- Ramanujan Sequence (modified)
- Regularized Gamma Function (modified)
- Sagitta (modified)
- Toroidal Polyhedron (modified)
Friday September 25, 2026
- Alon-Tarsi Number
- Anti-Concentration Inequality
- Arabic Numeral (modified)
- Banach Density (modified)
- Beloch Fold
- Berge Hypergraph
- Bidirected Graph
- Birkhoff Polytope
- Blasius Differential Equation (modified)
- Blasius Solution
- Center-Radius Form
- Complex Number (modified)
- Critical Polynomial
- Dirac Matrices (modified)
- Dot Product (modified)
- Erdős Problems (modified)
- Expectation Threshold
- Exponential Form
- Exterior Angle Theorem (modified)
- Fractional Expectation Threshold
- Frobenius Form
- Frobenius Method (modified)
- Frobenius Normal Form
- Frobenius Solution
- Fuchs's Theorem (modified)
- Functional Completeness
- Graph Degeneracy (modified)
- Haugstrup Graphs (modified)
- Hindu-Arabic Numeral
- Indo-Arabic Numeral
- Infinitesimal Bialgebra
- Linear Hypergraph
- Logarithm (modified)
- Logarithmic Form
- Lyapunov Equation
- Married Couples Problem (modified)
- Matrix Equation (modified)
- Maximal Arc
- Multi-Labeled Tree
- NAND (modified)
- NOR (modified)
- Nowhere-Zero Flow (modified)
- Pancyclic Graph (modified)
- Partition Crank
- Partition Mex
- Peirce's Arrow
- Phylogenetic Network
- Polar Form (modified)
- Principal Submatrix
- Quadratic Formula (modified)
- Random Transposition Walk
- Rectangular Form
- Representation Stability
- Signless Laplacian Matrix
- Signless Laplacian Spectral Radius
- Slope-Point Form
- Submatrix (modified)
- Vertex Form
Thursday September 24, 2026
- Aperiodic Monotile (modified)
- Bateman Equation
- Bateman Function (modified)
- Bernoulli's Paradox (modified)
- Burgers' Equation (modified)
- Cardioid Pedal Curve (modified)
- Characteristic Exponent
- Chebyshev Differential Equation (modified)
- Contravariant Tensor (modified)
- Copula (modified)
- Copula Distribution
- Covariant Tensor (modified)
- Devil's Curve (modified)
- Generalized Petersen Graph (modified)
- Honeycomb Toroidal Graph (modified)
- Hyperplane (modified)
- Hyperspace (modified)
- Index of Stability
- Invariant Factor (modified)
- ISBN (modified)
- Kempe-Kittell Coloring Algorithm (modified)
- Limaçon Evolute (modified)
- Location Parameter
- Scale Parameter
- Shape Parameter
- Skewness Parameter
- Smith Normal Form (modified)
- Square Covering
- Square Packing (modified)
- Tensor (modified)
- Thomassen Graphs (modified)
- Torus Grid Graph (modified)
- Trott Curve (modified)
Wednesday September 23, 2026
- Biaugmented Triangular Prism (modified)
- Biaugmented Truncated Cube (modified)
- Bilunabirotunda (modified)
- Bit Pigeonhole Principle (modified)
- Celmins-Swart Snarks (modified)
- Chvátal Graph (modified)
- Clifford Algebra (modified)
- Definable Amenability
- Definable Group
- Disphenocingulum (modified)
- Elliptic Gamma Function
- Elongated Pentagonal Cupola (modified)
- Elongated Pentagonal Dipyramid (modified)
- Elongated Pentagonal Gyrocupolarotunda (modified)
- Elongated Pentagonal Orthocupolarotunda (modified)
- Elongated Pentagonal Pyramid (modified)
- Elongated Square Cupola (modified)
- Elongated Triangular Cupola (modified)
- Elongated Triangular Dipyramid (modified)
- Elongated Triangular Pyramid (modified)
- Exoo-Ismailescu Graphs (modified)
- Fleischner Graphs (modified)
- Global Type
- Grötzsch Graph (modified)
- Gromov-Hausdorff Distance
- Gyroelongated Pentagonal Birotunda (modified)
- Gyroelongated Pentagonal Cupola (modified)
- Gyroelongated Pentagonal Cupolarotunda (modified)
- Gyroelongated Pentagonal Rotunda (modified)
- Gyroelongated Square Bicupola (modified)
- Gyroelongated Square Cupola (modified)
- Gyroelongated Square Pyramid (modified)
- Gyroelongated Triangular Bicupola (modified)
- Gyroelongated Triangular Cupola (modified)
- Harvey-Royle Graphs (modified)
- Hebesphenomegacorona (modified)
- Hypergraph Shadow
- Independence Property
- Isotropic Tensor (modified)
- Kalai's Conjecture for Tight Trees
- Kiteck-Payne Graph (modified)
- Loupekine Snarks (modified)
- Metric Space Magnitude
- Motzkin Number (modified)
- Nechushtan Graph (modified)
- Oloid (modified)
- Petrykowski's Conjecture
- Ramanujan Sequence
- Riordan Number
- Snail Graph (modified)
- Snub Square Antiprism (modified)
- Sousselier Graph (modified)
- Sphenocorona (modified)
- Sphenomegacorona (modified)
- Thomassen Graphs (modified)
- Tight Tree
- Triangular Hebesphenorotunda (modified)
- Triaugmented Dodecahedron (modified)
- Triaugmented Hexagonal Prism (modified)
- Triaugmented Truncated Dodecahedron (modified)
- Tridiminished Rhombicosidodecahedron (modified)
- Truncated Dodecadodecahedral Graph (modified)
- Truncated Square Lattice Graph (modified)
- Two-Circle Roller
Tuesday September 22, 2026
- Abelian Envelope
- Algebraic Area
- Astroid Pedal Curve (modified)
- Bilu-Linial Signing Conjecture
- Bit Pigeonhole Principle
- Blanuša Snarks (modified)
- Circle Pedal Curve (modified)
- Codomain (modified)
- Convective Derivative (modified)
- Convective Term
- Copeland-Erdős Constant (modified)
- Denominator (modified)
- Directed Erdős-Sós Theorem
- Domain (modified)
- Echelon Form (modified)
- Ellipse Parallel Curves (modified)
- Ellipse Pedal Curve (modified)
- Epicycloid (modified)
- Foster Cage (modified)
- Gaussian Cotype
- Hammer-Aitoff Equal-Area Projection (modified)
- Hodge Dual
- Hodge Star (modified)
- Kahn's Flow Conjecture
- Kusner's Conjecture
- Linearly Dependent Vectors (modified)
- Material Derivative (modified)
- Monoidal Category
- Monoidal Functor
- Navier-Stokes Equations (modified)
- Ochoa Curve (modified)
- Operator Cotype
- Oriented Area
- Pach-Tardos Conjecture
- Pseudotensor (modified)
- Pseudo-Tensor Category
- Rademacher Cotype
- Reduced Row Echelon Form (modified)
- RREF
- Runge-Kutta Algorithm
- Ryser's Conjecture
- Scarabaeus Curve (modified)
- Signed Area
- Simonovits-Sós Conjecture
- Simply Strongly Normal Number
- Snail Graph (modified)
- Strongly Normal Number
- Tachikawa's Second Conjecture
- Talagrand's Operator Cotype Problem
- Taylor Polynomial (modified)
- Telescoping Series (modified)
- Tensor Category (modified)
- Uniform Turán Density
- Universal Property (modified)
- Velocity Field
Monday September 21, 2026
- Bean Curve (modified)
- Brownian Bridge
- Divisor Function (modified)
- Doob h-Transform
- Erdős-Graham Binomial Divisor Problem
- First-Passage Time
- Fractional Chromatic Number (modified)
- Hitting Time
- Independence Ratio (modified)
- Kempe-Kittell Coloring Algorithm (modified)
- Kempe's Coloring Algorithm (modified)
- Lima Bean Curve (modified)
- Markov Bridge
- Primitive Pseudoperfect Number (modified)
- Schrödinger Bridge
- Snail Graph
- Stochastic Resetting
- Unit-Distance Graph (modified)
Saturday September 19, 2026
- Forbidden Minor (modified)
- Four-Color Theorem (modified)
- Graph Cartesian Product (modified)
- Graph Drawing
- Heilbronn Triangle Problem (modified)
- Hypergram
- Kempe Impasse
- Kempe-Kittell Coloring Algorithm (modified)
- Kochen-Specker Theorem
- Mermin Pentagram
- Outer-Cylindrical Graph
- Outerplanar Graph (modified)
- Peres-Mermin Square
- Triangle Dissection (modified)
Friday September 18, 2026
- 120-Cell (modified)
- 120-Cell Graph
- 24-Cell (modified)
- 24-Cell Graph
- 600-Cell (modified)
- 600-Cell Graph
- Catlin Graph
- Chomp
- Competitive Ratio
- Countable Random Graph
- Cubic Hypohamiltonian Graph (modified)
- Cubic Planar Hypohamiltonian Graph (modified)
- Georges-Kelmans Graph (modified)
- Hajós Conjecture
- Hajós Graph (modified)
- Heawood Four-Color Graph (modified)
- Heawood Four-Color Map (modified)
- Heawood Four-Color Map Graph
- Kelmans-Georges Graph
- Kripke Frame
- k-Server Problem
- Medvedev Logic
- Moser Spindle (modified)
- Mosseri-Sadoc Tiles (modified)
- Mycielski Graph (modified)
- Online Algorithm
- Period-Index Conjecture
- Petersen Coloring Conjecture (modified)
- Rado Graph
- Ramsey Graph
- Ramsey Number (modified)
- Schrijver Graph
- Shift Graph
- Simonovits Product Conjecture
- Skvortsov Logic
- Standard Torus
- Sunlet Graph (modified)
- Theta Graph
- Torus (modified)
- Villarceau Circles (modified)
- Wang Tile
- Work Function Algorithm
Thursday September 17, 2026
- 13 Colonies Graph
- Contiguous USA Graph (modified)
- Errera Graph (modified)
- Four-Color Theorem (modified)
- Heawood Four-Color Map (modified)
- Johnson Skeleton Graph (modified)
- Kempe Chain (modified)
- Kempe-Kittell Algorithm
- Kempe-Kittell Coloring Algorithm
- Kempe's Coloring Algorithm
- McGregor Map (modified)
- Pentakis Icosidodecahedral Graph (modified)
- Snub Cubical Graph (modified)
- Thirteen Colonies Graph
- Wagon USA Map Graph
Wednesday September 16, 2026
- Incompressible Porous Media Equation (modified)
- Petersen Coloring (modified)
Tuesday September 15, 2026
- de Bruijn-Newman Constant (modified)
- Heesch Number (modified)
- Navier-Stokes Equations (modified)
- P-Coloring
- Petersen Coloring
- Petersen Coloring Conjecture (modified)
- Petersen Graph (modified)
- Stoneham Number (modified)
Monday September 14, 2026
- Acyclic Polynomial (modified)
- Albertson-Berman Conjecture
- Berlekamp-van Lint-Seidel Graph (modified)
- de Bruijn Torus
- Eternal Dominating Set
- Eternal Domination Number (modified)
- Four-Color Theorem (modified)
- Gamma-Theta Conjecture
- General Position (modified)
- Heesch Number (modified)
- Hemiobelisk (modified)
- Induced Forest
- Induced Forest Polynomial
- Morris's Conjecture (modified)
- Petersen Coloring Conjecture (modified)
- Queens Problem (modified)
- Rational Distances (modified)
- Rational Distance Set
- Three Squares in a Rectangle Problem
- Trinity Graph
Sunday September 13, 2026
- 2-Treedepth (modified)
- Block Treedepth
- Graph Crossing
- Heesch Number (modified)
- Hook Length
- Kummer Graph (modified)
- Mass Gap (modified)
- Squared Torus (modified)
- Treedepth (modified)
- Well-Posed (modified)
- Z-Number (modified)
Saturday September 12, 2026
- Bollobás-Nikiforov Conjecture
- FC-Family
- Frankl-Complete Configuration
- Grothendieck's Constant (modified)
- Hemiobelisk (modified)
- Hilbert Transform-UMD Constant Dependence Problem
- Hilbert Transform-Unconditional Martingale Differences Constant Dependence Problem
- Millennium Prize Problems (modified)
- Morris's Conjecture
- Navier-Stokes Equations (modified)
- Squared Torus (modified)
- Union-Closed Sets Conjecture (modified)
Friday September 11, 2026
- 2-Treedepth
- Algebraic Cycle
- Binding Number
- Chain Polytope
- Chordal Graph (modified)
- Core Partition
- Cubic Equation (modified)
- Cycle
- Cyclic Basis Ordering
- Cyclic Order (modified)
- Dehn-Sommerville Equations
- Delannoy Polynomial
- Dichromatic Number
- Directed Clique Number
- Edge-Ordered Graph
- Faulhaber's Formula (modified)
- Gamma Vector
- Geodetic Graph (modified)
- Graphical Arrangement
- Graph Saturation
- Ground Set (modified)
- Hermitian Adjacency Matrix
- Hernández-Vélez-Leaños-Salazar Graph (modified)
- Hodge Class
- Hodge Conjecture (modified)
- Hodge Cycle
- Hoffman Graph (modified)
- Independence Complex
- Induced Matching
- Induced Matching Treewidth
- Kajitani-Ueno-Miyano Conjecture
- Mass Gap
- Matroid (modified)
- Maxcut (modified)
- Millennium Prize Problems (modified)
- Mixed Graph (modified)
- Multiplication Table (modified)
- Napier's Bones (modified)
- Naples Parking Function
- Order Polytope
- Oriented-Cycle Game
- Owens Graphs (modified)
- Parking Function
- Partially Ordered Pattern
- Partitioned Permutohedron
- Perfect State Transfer
- Permutohedron (modified)
- Prime Number (modified)
- Pseudoline (modified)
- P Versus NP Problem (modified)
- Regular Icosahedron (modified)
- Riemann Hypothesis (modified)
- Roman Numerals (modified)
- Sieve of Eratosthenes (modified)
- Simple Polytope
- Simplicial Polytope
- Stober-WeißGraphs
- Ternary Graph (modified)
- Tredoku Pattern
- Tree Decomposition (modified)
- Treedepth (modified)
- Tree-Independence Number
- Treewidth (modified)
- Uniformly Dense Matroid
- Vector Chromatic Number
- Yang-Mills Equation (modified)
- Yang-Mills Existence and Mass Gap Problem
- Zero (modified)
Thursday September 10, 2026
- Cap (modified)
- Confluence (modified)
- Cylinder Point Picking
- Disk Point Picking (modified)
- Hernández-Vélez-Leaños-Salazar Graph (modified)
- Ill-Defined (modified)
- Ill-Posed (modified)
- Mortality Problem (modified)
- Mrs. Perkins's Quilt (modified)
- Perfect Square Dissection (modified)
- Point Picking (modified)
- Poorly Defined
- Pseudoline
- Pseudolinear Crossing Number
- Shannon Capacity (modified)
- Squared Torus
- Torus Dissection (modified)
- Uniform Distribution (modified)
- Uniform Sampling
- Well-Defined (modified)
- Well-Posed
Wednesday September 9, 2026
- 1's Complement
- 2's Complement
- Acute Golden Rhombohedron (modified)
- Ammann-Kramer-Neri Tiling
- Asymptotic Density
- Bernoulli Percolation Model (modified)
- Binary (modified)
- Binary Expansion (modified)
- Bond Percolation (modified)
- Boussinesq System
- Decimal Expansion (modified)
- Deflation
- Erdős Problems
- Euclid-Euler Theorem (modified)
- Euler-Euclid Theorem
- Euler's Equations of Inviscid Motion (modified)
- Fermat Number (modified)
- Golden Gnomon (modified)
- Golden Rhombohedron (modified)
- Golden Tetrahedron
- Golden Triangle (modified)
- Hernández-Vélez-Leaños-Salazar Graph
- Incompressible Porous Media Equation
- Inflation
- Irrationality Measure (modified)
- Jacobian Conjecture (modified)
- Koizumi-Liu Conjecture
- Kramer-Neri Tiling
- Minimally Curvy Graph (modified)
- Mosseri-Sadoc Tiles
- Natural Density (modified)
- Negabinary (modified)
- Normal Number (modified)
- Obtuse Golden Rhombohedron (modified)
- Ones' Complement
- Penrose Tiles (modified)
- Percolation Threshold (modified)
- Plastic Constant (modified)
- Quaquaversal Tiling (modified)
- Reciprocal Fermat Constant
- Rectilinear Crossing Number (modified)
- Rep-Tile (modified)
- SCD Tile
- SCD Tiling
- Schmitt-Conway Biprism (modified)
- Schmitt-Conway-Danzer Tile
- Separable Jacobian Conjecture
- Shannon Capacity (modified)
- Sign-and-Magnitude Representation
- Signed-Magnitude Representation
- Sign-Magnitude Representation
- Substitution System (modified)
- Substitution Tiling
- Three-Dimensional Penrose Tiling
- Tile Deflation
- Tile Inflation
- Tiling (modified)
- Two's Complement
- Vorticity
Tuesday September 8, 2026
- 100 Prisoners Problem (modified)
- 16-Cell (modified)
- Alternated Cubic Honeycomb
- Antibox Graph (modified)
- Beale-Kato-Majda Criterion
- Brick-Wall Representation
- Central Limit Theorem (modified)
- Coin Paradox (modified)
- Compressed Sensing (modified)
- Cubic Close Packing (modified)
- Distinct Prime Factors (modified)
- Ducci Sequence (modified)
- Egyptian Mathematical Leather Roll (modified)
- Erdős-Borwein Constant (modified)
- Euler's Equations of Inviscid Motion (modified)
- Even Perfect Number (modified)
- Experimental Mathematics (modified)
- Extended Goldbach Conjecture (modified)
- Franklin Graph (modified)
- Goldbach Conjecture (modified)
- Goldbach Partition (modified)
- Graph Likelihood (modified)
- Hailstone Number (modified)
- Hilbert Matrix (modified)
- Honeycomb (modified)
- Honeycomb Toroidal Graph (modified)
- Infinite Monkey Theorem (modified)
- Kagome Lattice
- Kagome Lattice Graph
- Kepler's Wine Barrel Problem (modified)
- Markov Order
- Mersenne Prime (modified)
- Millennium Prize Problems (modified)
- Minimally Curvy Graph (modified)
- Mortality Problem (modified)
- Navier-Stokes Equations (modified)
- n-Number Game
- Octet Truss
- Prime Factor (modified)
- Proper Factor (modified)
- Rational Matrix
- Regular Graph (modified)
- Regular Tetrahedron (modified)
- Riemannian Geometry (modified)
- Secretary Problem (modified)
- Simpson's Rule (modified)
- Sleeping Beauty Paradox (modified)
- Spherical Geometry (modified)
- Stamp Folding Problem (modified)
- Stella Octangula (modified)
- Strongly Regular Graph (modified)
- Ternary Goldbach Conjecture (modified)
- Tetrahedral-Octahedral Honeycomb
- Thâbit ibn Kurrah Number
- Thâbit ibn Kurrah Prime
- Thâbit ibn Kurrah Rule
- Thābit ibn Qurra Number (modified)
- Thābit ibn Qurra Prime (modified)
- Thābit ibn Qurra Rule (modified)
- Thābit ibn Qurra's Theorem (modified)
- Topological Linear Space
- Toroidal Embedding
- Torus Graph Embedding (modified)
- Trihexagonal Tiling
- Tusi Couple (modified)
- Tutte 12-Cage (modified)
- Universality (modified)
- von Neumann's Elephant (modified)
- Wagner Graph (modified)
Monday September 7, 2026
- 100 Prisoners Problem
- 16-Cell Graph
- 37
- Absolutely Continuous Function
- Barrel (modified)
- Barrel Problem
- Bethe Permanent
- Book Stacking Problem (modified)
- Boundary Complex
- Bounded Gaps Between Primes (modified)
- Cellular Embedding (modified)
- Circular Drawing (modified)
- Circular Embedding (modified)
- Closed 2-Cell Embedding
- Collatz Conjecture (modified)
- Colombo's Determinant Problem
- Complex Manifold (modified)
- Complex Projective Plane (modified)
- Compressed Sensing
- Conway's Refinement Conjecture
- CR Manifold
- Császár Polyhedron (modified)
- Curvy Graph (modified)
- Darboux Map
- Daykin-Frankl Conjecture
- Dean's Conjecture (modified)
- Definable Set (modified)
- Density Matrix
- Dixmier Conjecture
- Double Prime (modified)
- Double Prime Mark
- Ducci Map
- Elephant Curve
- Embedding (modified)
- Epicycloid (modified)
- Eternal Domination Number
- Euclid-Euler Theorem
- Euler Genus
- Expectation Value (modified)
- Face-Width
- Fixing Number (modified)
- Forking
- Four-Number Game
- Golden Angle (modified)
- Graceful Tree Theorem (modified)
- Graph Basis Number
- Graph Embedding (modified)
- Graphical Scalar Curvature Equation
- Hilbert Hotel (modified)
- Hilbert-Pólya Conjecture (modified)
- Horizontal Cylindrical Segment (modified)
- Hypersphere Packing (modified)
- Hypocycloid (modified)
- Ibragimov-Iosifescu Conjecture
- Icosidodecahedron (modified)
- Induced Subcomplex
- Integral Drawing (modified)
- Integral Embedding
- Interval Notation (modified)
- Ishango Bone (modified)
- Keisler Measure
- Kepler Barrel Problem
- Kepler Conjecture (modified)
- Kepler's Barrel Rule
- Kepler's Wine Barrel Problem
- Kissing Number (modified)
- Köthe's Conjecture
- Lindeberg Universality Principle
- Linear Source Coding
- Liouville Function (modified)
- Liouville Summatory Function
- Locker Puzzle
- Logarithmic Density
- Mangoldt Function (modified)
- Mangoldt Summatory Function
- Marriage Theorem (modified)
- Matthews Map
- McKean Entropy-Production Conjecture
- Mersenne Number (modified)
- Neighborly Triangulation
- Newton's Pi Series
- No-Disentanglers Conjecture
- Non-Euclidean Geometry (modified)
- Odd Perfect Number (modified)
- Omnific Integer (modified)
- Order-Convex Set
- Ordered Ring
- Owens Graphs (modified)
- Perfect Number (modified)
- Permanent (modified)
- Phi-Mixing
- Pi Formulas (modified)
- Planar Embedding (modified)
- Planar Graph Embedding (modified)
- Planar Map
- Planar Straight Line Embedding (modified)
- Plane Graph (modified)
- Poisson Conjecture
- Pólya Conjecture (modified)
- Prime (modified)
- Prime Gaps (modified)
- Prime Mark
- Prime Nu Function
- Prime Omega Function
- Prisoner's Dilemma (modified)
- Projective Plane Crossing Number (modified)
- Projective Plane Graph Embedding
- Promise Problem
- Proper Generalized Decomposition
- Proper Hat Guessing Number
- Proper Orthogonal Decomposition
- Pseudorandom Unitary
- QMA
- Quantum Channel
- Quantum Entanglement
- Rate-Distortion Function
- Real Projective Space
- Regular Icosidodecahedron
- Representativity
- Scale-Free Network (modified)
- Secretary Problem
- Seislet Transform
- Simple Theory
- Sleeping Beauty Paradox
- Smale's Mean Value Conjecture
- Small World Network (modified)
- Small World Phenomenon (modified)
- Stable Forking Conjecture
- Stable Formula
- Stable Marriage Problem (modified)
- Stamp Folding Problem
- Straight Line Drawing (modified)
- Straight Line Embedding (modified)
- Strong Embedding
- Strong Isometric Dimension
- Terras Map
- Tight Frame
- Tight Triangulation
- Topological Graph Theory (modified)
- Toroidal Crossing Number (modified)
- Toroidal Graph (modified)
- Torus Graph Embedding
- Total Variation (modified)
- Total Variation Distance
- Trace Distance
- Trautman Conjecture
- Unit-Distance Embedding (modified)
- Unreasonable Effectiveness of Mathematics
- Vector Angle
- Vector Notation
- Vinogradov's Theorem (modified)
- von Neumann's Elephant
- Weak Goldbach Conjecture
- Weyl Algebra
- Wine Barrel Problem
Saturday September 5, 2026
- Cubic Symmetric Graph (modified)
- Dyck Graph (modified)
- Foster Graph (modified)
- Heawood Graph (modified)
- Möbius-Kantor Graph (modified)
- Nauru Graph (modified)
- Shrikhande Graph (modified)
- Tesseract Graph (modified)
- Utility Graph (modified)
Friday September 4, 2026
- Paley Graph (modified)
- Pappus Graph (modified)
- Tesseract Graph (modified)
Thursday September 3, 2026
- Grabarchuk Graph (modified)
Wednesday September 2, 2026
- Annihilator Method
- b-Dense Number
- Daisy (modified)
- Dense (modified)
- Dense Set
- Direct Variation
- Ducci Sequence
- Edwards Curve
- Equidistributed Sequence (modified)
- Graph Modularity (modified)
- Hoeffding Inequality
- Indeterminate Form (modified)
- Interval (modified)
- Interval Notation
- Least Absolute Remainder
- Lucas-Carmichael Number
- Malthusian Growth Model
- Maximum Modularity
- Metric Voting Distortion
- Modular Euclidean Lattice
- Modularity
- Modular Lattice (modified)
- Neovius Minimal Surface
- Normal Number (modified)
- Nowhere Dense (modified)
- Pfaffian Equation
- Pfaffian Form (modified)
- Pfaffian System (modified)
- Phyllotaxis (modified)
- Quantile (modified)
- Quantile Function (modified)
- Social Choice Theory (modified)
- Stirling Constant
- Stirling's Approximation (modified)
- Twisted Edwards Curve
- Vogel Spiral (modified)
Tuesday September 1, 2026
- Adjoint (modified)
- Adjoint Matrix (modified)
- Adjoint Operator
- Adjugate Matrix (modified)
- Angle of Depression
- Angle of Elevation
- Banach Adjoint
- Bayesian Belief Network
- Bayesian Inference
- Bayesian Probability
- Bayesian Statistics
- Bearing
- Beta Function (modified)
- Boolean Variable
- Breadth
- Buckingham Pi Theorem
- Carroll Diagram
- Classical Adjoint
- Cluster Sampling
- Completely Randomized Design
- Confounding Variable
- Conjugate Transpose (modified)
- Control Group
- Convenience Sampling
- Decile
- Deleted Neighborhood
- Dependent Events
- Depression Angle
- Difference of Cubes
- Dimensional Analysis
- Discontinuity (modified)
- Double-Blind Experiment
- Elevation Angle
- Empirical Rule
- Expectation
- Experimental Unit
- Explanatory Variable
- Fermat Factorization
- Finite Geometric Series
- Five-Number Summary
- Flower of Life (modified)
- Formal Adjoint
- Generalized Vanishing Conjecture
- Grand Tour
- Graph Automorphism Group (modified)
- Graph Lexicographic Product (modified)
- Graph Likelihood (modified)
- Hermitian Adjoint
- Hermitian Operator (modified)
- Higher-Order Derivative
- Icosidodecahedron (modified)
- Infinite Discontinuity (modified)
- Interquartile Range (modified)
- Least Integer Function
- Likelihood (modified)
- Linear Dependence
- Linearity Assumption
- Linear Regression (modified)
- Lurking Variable
- Mantel's Theorem
- Matched-Pairs Design
- Measurement Error
- Metatron's Cube (modified)
- Modified Boxplot
- Multiplicative Complexity
- Navier-Stokes Equations (modified)
- Nonresponse Bias
- Numerical Analysis
- Oblique Asymptote
- Observational Study
- One-Dimensional Wave Equation
- One-Sided Limit
- Operation Table
- Oscillatory Discontinuity
- Overlapping Circles Grid (modified)
- Piecewise Continuous Function
- Platonic Solid (modified)
- Posterior Probability
- Power of a Test
- p-Trigonometric Functions
- Punctured Neighborhood
- Quintile
- Random Assignment
- Randomized Block Design
- Randomized Complete Block Design
- Regular Dodecahedron (modified)
- Regular Skew Apeirohedron
- Regular Skew Polyhedron (modified)
- Removable Discontinuity (modified)
- Resistant Statistic
- Response Bias
- Response Variable
- Sector
- Seed of Life (modified)
- Self-Adjoint (modified)
- Simple Random Sample
- Slant Asymptote
- Small Rhombicuboctahedron (modified)
- Spurious Solution
- Squigonometric Functions
- Squigonometry
- Step Discontinuity
- Stratified Sampling
- Sum and Difference of Cubes
- Sum of Two Cubes Factorization
- Superellipse (modified)
- Taylor Remainder
- Ten's Complement
- Tercile
- Tertile
- Thickness (modified)
- Tilted Asymptote
- Triangle-Free Graph (modified)
- Triangular Membrane
- Trigonometric Functions (modified)
- Trigonometry (modified)
- Truncated Icosahedron (modified)
- Truncated Octahedron (modified)
- Turán's Theorem (modified)
- Turnstile
- Undercoverage
- Underdetermined System
- Underdetermined System of Equations
- Vanishing Conjecture (modified)
- Vector Calculus
- Vogel Spiral
- Voluntary Response Sample
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