# New in *MathWorld* -- October
2002

### Thursday October 31, 2002

- Chord (modified)
- Chordal Graph
- Chordless Cycle
- Chromatic Number (modified)
- Clique Number (modified)
- Cycle Chord
- e (modified)
- Edge Set (modified)
- Heptadecagon (modified)
- Irrationality Measure (modified)
- Map Cycle (modified)
- Permutation Cycle (modified)
- Vertex Set (modified)

### Wednesday October 30, 2002

- Alhazen's Billiard Problem (modified)
- Archimedean Graph (modified)
- Bilateral Z-Transform
- Billiards (modified)
- Consecutive Numbers
- Even Number (modified)
- Irrationality Measure (modified)
- Liouville's Approximation Theorem (modified)
- Misère-Form Game (modified)
- Odd Number (modified)
- Pi Approximations (modified)
- Unilateral Z-Transform
- Z-Transform (modified)

### Tuesday October 29, 2002

- Cage Graph (modified)
- Consecutive Number Sequences (modified)
- Demlo Number (modified)
- Doubly Periodic Function (modified)
- Foster Cage (modified)
- Free Action (modified)
- Free Idempotent Monoid (modified)
- Group Homomorphism (modified)
- Meringer Graph (modified)
- Periodic Function (modified)
- Ramanujan's Master Theorem (modified)
- Repunit (modified)
- Robertson-Wegner Graph (modified)
- Singly Periodic Function
- Smarandache Sequences (modified)
- Triply Periodic Function
- Universality (modified)
- Wong Graph (modified)
- Z-Transform (modified)

### Monday October 28, 2002

- Bessel Function of the First Kind (modified)
- Cage Graph (modified)
- Foster Cage (modified)
- Generalized Petersen Graph (modified)
- Meringer Graph
- Robertson-Wegner Graph (modified)
- Square Dissection (modified)
- Triangle Dissection
- Wong Graph (modified)
- Young Girl-Old Woman Illusion (modified)
- Z-Transform (modified)

### Sunday October 27, 2002

- Concyclic (modified)
- Coplanar (modified)
- Vertex Figure (modified)

### Saturday October 26, 2002

- Great Rhombicosidodecahedron (modified)
- Great Rhombicuboctahedron (modified)
- Least Squares Fitting--Polynomial (modified)
- Square Dissection

### Friday October 25, 2002

- Archimedean Graph
- Balaban Graphs
- Cage Graph (modified)
- Cubic Graph (modified)
- Cubic Nonplanar Graph
- Cuboctahedral Graph (modified)
- Foster Cage
- Generalized Petersen Graph (modified)
- Great Rhombicuboctahedral Graph
- Grinberg Graphs
- Harries Graph
- Harries-Wong Graph
- Icosidodecahedral Graph (modified)
- Möbius Ladder
- Robertson-Wegner Graph (modified)
- Small Rhombicuboctahedral Graph (modified)
- Tait's Hamiltonian Graph Conjecture (modified)
- Truncated Cubical Graph
- Truncated Dodecahedral Graph
- Truncated Icosahedral Graph
- Truncated Octahedral Graph
- Truncated Tetrahedral Graph
- Tutte's Graph (modified)
- Wong Graph

### Thursday October 24, 2002

- Bernoulli Triangle
- Mastermind
- Subresultant (modified)

### Tuesday October 22, 2002

- Whipple's Transformation (modified)

### Monday October 21, 2002

- Cayley Graph (modified)
- Complex Map
- Faithful Group Action (modified)
- Free Action (modified)
- Generalized Petersen Graph (modified)
- Hyperbolic Map (modified)
- Map (modified)
- Ramanujan's Interpolation Formula (modified)
- Ramanujan's Master Theorem (modified)
- Square Antiprism (modified)
- Tetragonal Trapezohedron
- Three-Colorable Map (modified)

### Sunday October 20, 2002

- Cubic Symmetric Graph (modified)
- Dyck Graph
- Group Generators (modified)
- Möbius-Kantor Graph
- Pappus Graph (modified)
- Proper Subgroup
- Subgroup (modified)
- Vertex-Transitive Graph (modified)

### Saturday October 19, 2002

- Cayley Graph (modified)
- Cubical Graph (modified)
- Cubic Symmetric Graph (modified)
- Desargues Graph (modified)
- Gear Graph (modified)
- Generalized Petersen Graph
- Petersen Graph (modified)
- Prism Graph (modified)
- Regular Graph (modified)
- Simple Graph (modified)
- Unitransitive Graph (modified)

### Friday October 18, 2002

- Graph Spectrum (modified)
- Integral Graph
- Matrix Spectrum (modified)
- Quintic Symmetric Graph (modified)
- Snub Dodecahedral Graph
- Symmetric Graph (modified)

### Thursday October 17, 2002

- Anosov Diffeomorphism (modified)
- Anosov Map (modified)
- Bernoulli Number (modified)
- Complete Graph (modified)
- Diophantine Equation--2nd Powers (modified)
- k-Chromatic Graph (modified)
- Nearest Prime
- Prime Distance
- Ramanujan's Square Equation (modified)
- Zernike Polynomial (modified)

### Wednesday October 16, 2002

- Riemann Zeta Function (modified)

### Tuesday October 15, 2002

- Altitude Triangle (modified)
- Bitwin Chain (modified)
- Golden Ratio (modified)
- Great Rhombicosidodecahedral Graph
- Great Rhombicosidodecahedron (modified)
- Lucas Number (modified)
- Octahedral Equation
- Pedal Triangle (modified)
- Polar Zonohedron
- Prüfer Code (modified)
- Quintic Symmetric Graph (modified)
- Snub Cubical Graph
- Star (modified)
- Tetrahedral Equation

### Monday October 14, 2002

- Quintic Symmetric Graph (modified)

### Sunday October 13, 2002

- Erdős-Borwein Constant (modified)
- Yff Conjecture (modified)

### Saturday October 12, 2002

### Friday October 11, 2002

- Barnette's Conjecture (modified)
- Cubic Symmetric Graph (modified)
- e (modified)
- e Approximations
- Euler-Mascheroni Constant (modified)
- Euler-Mascheroni Constant Approximations
- Lights Out Puzzle (modified)
- Null Graph (modified)
- Weakly Regular Graph

### Thursday October 10, 2002

### Wednesday October 9, 2002

- Arithmetic-Geometric Mean (modified)
- Clebsch Graph

### Sunday October 6, 2002

- Lambert W-Function (modified)

### Saturday October 5, 2002

### Friday October 4, 2002

- Bipartite Graph (modified)
- Chromatic Number (modified)
- k-Chromatic Graph
- k-Colorable Graph
- Möbius Net (modified)

### Thursday October 3, 2002

- Bicolorable Graph
- Great Ditrigonal Dodecicosidodecahedron (modified)
- Icosahedral Equation (modified)
- Three-Colorable Graph
- Triangle-Free Graph (modified)

### Wednesday October 2, 2002

- Graph Thickness (modified)
- Outerplanar Graph (modified)
- Pursuit Curve (modified)

### Tuesday October 1, 2002

- Biggs-Smith Graph (modified)
- Box-and-Whisker Plot (modified)
- Generalized Vandermonde Matrix
- Totally Positive Matrix
- Vandermonde Matrix (modified)

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