# New in *MathWorld* -- December
2001

### Monday December 31, 2001

- Gray Graph (modified)

### Sunday December 30, 2001

- Augmentation (modified)
- Cube (modified)
- Octahedron (modified)
- Origami (modified)
- Small Stellated Dodecahedron (modified)
- Spiky (modified)
- Tetrahedron (modified)

### Saturday December 29, 2001

- Anosov Map (modified)
- Demiregular Tessellation
- Regular Tessellation
- Simple Polygon (modified)
- Tessellation (modified)

### Thursday December 27, 2001

- Great Rhombicosidodecahedron (modified)
- Icosahedron (modified)
- Icosidodecahedron (modified)

### Monday December 24, 2001

- Brocard Points (modified)
- Cevian Circle (modified)
- Cevian Triangle (modified)
- Triangle Centroid (modified)

### Sunday December 23, 2001

- Chromatic Number (modified)
- Directed Graph (modified)
- Graph Cycle (modified)
- Grötzsch Graph
- Harary Graph (modified)
- Hasse Diagram (modified)
- Herschel Graph
- Hypercube (modified)
- Icosahedral Graph (modified)
- Knight's Tour Graph
- Line Graph (modified)
- Meredith Graph (modified)
- Mycielski Graph
- Octahedral Graph (modified)
- Odd Graph (modified)
- Path Graph (modified)
- Perfect Matching (modified)
- Permutation Graph (modified)
- Shuffle-Exchange Graph
- Thomassen Graphs (modified)
- Triangle-Free Graph
- Turán Graph (modified)
- Tutte 8-Cage (modified)
- Tutte's Fragment
- Tutte's Graph (modified)

### Saturday December 22, 2001

- Franklin Graph (modified)
- Frucht Graph (modified)
- Grid Graph (modified)
- Pancake Sorting (modified)
- Petersen Graph (modified)

### Monday December 17, 2001

- Coxeter Graph (modified)
- de Bruijn Graph (modified)
- Deltahedron (modified)
- Empty Graph (modified)
- Folkman Graph (modified)
- Normal Number (modified)
- Spiky (modified)
- Yff Center of Congruence (modified)

### Sunday December 16, 2001

- Boolean Algebra (modified)
- Cage Graph (modified)
- Complete Binary Tree (modified)
- Complete Graph (modified)
- Complete k-Partite Graph (modified)
- Complete Ternary Tree (modified)
- Complete Tree (modified)
- Cubical Graph (modified)
- Dodecahedral Graph (modified)
- Escher's Solid (modified)
- Graph (modified)
- Hypercube (modified)
- McGee Graph (modified)
- Robertson Graph (modified)
- Simple Graph (modified)
- Unitransitive Graph (modified)

### Saturday December 15, 2001

- Gnomonic Number
- Gnomonic Projection
- Kuratowski's Closure-Complement Problem
- Mersenne Prime (modified)
- Möbius Strip (modified)
- Spieker Center (modified)
- Spieker Circle (modified)
- Spiky

### Friday December 14, 2001

- Logistic Map--r=-2 (modified)
- Logistic Map--r=2 (modified)
- Logistic Map--r=4 (modified)
- Normal Number (modified)

### Thursday December 13, 2001

- Hermitian Matrix (modified)
- Prime Gaps (modified)
- Titanic Prime (modified)

### Wednesday December 12, 2001

- Factorial (modified)
- Gnomon Magic Square (modified)
- Irregular Prime (modified)

### Tuesday December 11, 2001

- Neuberg Circles (modified)
- Wilson's Theorem (modified)

### Monday December 10, 2001

- Codimension (modified)
- Zeta Function (modified)

### Saturday December 8, 2001

- Bivariate
- Flanders' Inequality (modified)
- Multivariate
- Univariate

### Friday December 7, 2001

- Prime Number (modified)

### Thursday December 6, 2001

- Polykite (modified)

### Saturday December 1, 2001

- Repdigit (modified)
- Repunit (modified)
- Triangle Center (modified)
- Triangle Center Function (modified)

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