# New in *MathWorld* -- May
2002

### Friday May 31, 2002

### Thursday May 30, 2002

- Grid Graph (modified)
- Group Automorphism (modified)
- Ideal Height
- Inductive Set
- Kneser Graph
- Kneser's Conjecture
- Legendre Polynomial (modified)
- Neighborhood (modified)
- Neighborhood Complex
- Normed Ring
- Puz-Graph

### Wednesday May 29, 2002

- Fault-Free Rectangle (modified)
- Finite Graph
- Graph Distance
- Graph Geodesic (modified)
- Infinite Graph
- Locally Finite Graph
- Newton's Method (modified)
- Sophie Germain Prime (modified)

### Tuesday May 28, 2002

- Dual Tessellation (modified)
- Prime Counting Function (modified)
- Singular Value (modified)

### Sunday May 26, 2002

### Saturday May 25, 2002

- Betti Number (modified)
- Bijective
- Bimagic Cube (modified)
- Hundred-Dollar, Hundred-Digit Challenge Problems (modified)
- Inverse Function (modified)

### Thursday May 23, 2002

- Annulus (modified)
- Constructible Polygon (modified)
- Inverse Cotangent (modified)
- Regular Polygon (modified)
- Sinc Function (modified)
- Trigonometry Angles (modified)

### Wednesday May 22, 2002

- Berlekamp-Zassenhaus Algorithm (modified)
- Bernoulli Number (modified)

### Monday May 20, 2002

- Binary (modified)
- Natural Logarithm (modified)
- Natural Logarithm of 2
- Nonagonal Number (modified)
- Polygonal Number (modified)
- Square Pyramidal Number (modified)
- Star Number (modified)
- Tritriangular Number (modified)

### Sunday May 19, 2002

### Friday May 17, 2002

### Thursday May 16, 2002

### Wednesday May 15, 2002

### Tuesday May 14, 2002

- Baer's Criterion
- Commutative Diagram
- Homoclinic Point (modified)
- Homoclinic Tangle (modified)
- Mobile Automaton
- Principle of Computational Equivalence
- Register Machine
- Smale Horseshoe Map (modified)
- Substitution System (modified)
- Tag System
- Wolfram Sequences

### Monday May 13, 2002

- Spiral Similarity (modified)

### Sunday May 12, 2002

- Riemann Tensor (modified)

### Saturday May 11, 2002

### Friday May 10, 2002

- Angel Problem
- Artinian Module
- Cok
- Coker
- Gabriel's Staircase (modified)
- Group Kernel
- Ker (modified)

### Wednesday May 8, 2002

- Entire Function (modified)
- Wallpaper Groups (modified)

### Tuesday May 7, 2002

- Butterfly Lemma
- Cross Product (modified)
- Flat Origami
- Kawasaki's Theorem
- Maekawa's Theorem
- Odd Power
- Polygon Tessellation
- Prime Spiral (modified)
- Tessellation (modified)
- Wallpaper Groups (modified)

### Monday May 6, 2002

- Convex Polygon (modified)
- Fresnel Integrals (modified)
- Kummer's Test (modified)
- Perfect Power
- Power (modified)

### Sunday May 5, 2002

- Bernoulli Number (modified)
- Catalan's Conjecture (modified)
- Catalan's Diophantine Problem (modified)
- Double Wieferich Prime Pair
- Euler Polynomial (modified)
- Wallis Cosine Formula (modified)
- Wallis Sine Formula (modified)

### Saturday May 4, 2002

- Automorphic Number (modified)
- Floor Function (modified)
- Fractional Part (modified)
- Goldbach Conjecture (modified)
- Moiré Pattern (modified)
- Power Floors
- Power Fractional Parts
- Riemann Zeta Function (modified)
- Simple Harmonic Motion--Quadratic Perturbation (modified)
- Tritriangular Number
- Unsolved Problems (modified)
- Zonohedron (modified)

### Friday May 3, 2002

- Apollonian Gasket (modified)
- Bowling (modified)
- Chebyshev (modified)
- Origami (modified)

### Thursday May 2, 2002

- Abel Prize
- Chessboard (modified)
- Cole Prize
- Endomorphism (modified)
- Endomorphism Ring
- Fibonacci n-Step Number (modified)
- Klein's Absolute Invariant (modified)
- Tangram (modified)

### Wednesday May 1, 2002

- AND (modified)
- Householder's Method (modified)
- Logarithmic Integral (modified)
- Mandelbrot Set (modified)
- Newton's Method (modified)
- Schur's Lemma (modified)

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