# New in *MathWorld* -- December
2010

### Thursday December 30, 2010

- Plane Curve (modified)
- Resistance-Equivalent Graphs (modified)

### Wednesday December 29, 2010

- Angle (modified)
- Determined by Spectrum (modified)
- Möbius Graph

### Tuesday December 28, 2010

### Sunday December 26, 2010

- Cayley Graph (modified)

### Saturday December 25, 2010

### Thursday December 23, 2010

- Gaussian Curvature (modified)
- Lancret Equation (modified)
- NP-Complete
- NP-Hard
- Torsion (modified)
- Total Curvature (modified)

### Wednesday December 22, 2010

### Monday December 20, 2010

- Alternating Group Graph
- Arrangement Graph (modified)
- Cayley Graph (modified)
- Permutation Star Graph (modified)

### Sunday December 19, 2010

- Permutation Star Graph (modified)

### Tuesday December 14, 2010

- Set of Complex Numbers
- Set of Complex Numbers C
- Set of Integers
- Set of Integers Z
- Set of Natural Numbers
- Set of Natural Numbers N
- Set of Negative Integers
- Set of Negative Integers Z^-
- Set of Nonnegative Integers
- Set of Nonnegative Integers Z^*
- Set of Nonpositive Integers
- Set of Positive Integers
- Set of Positive Integers Z^+
- Set of Rational Numbers
- Set of Rational Numbers Q
- Set of Real Numbers
- Set of Real Numbers R
- Set of Whole Numbers
- Set of Whole Numbers Z

### Friday December 10, 2010

### Thursday December 9, 2010

- Champernowne Constant (modified)
- Euler-Mascheroni Constant (modified)

### Wednesday December 8, 2010

- Arc Symmetric Graph
- Arrangement Graph
- Collatz Problem (modified)
- Edge Symmetric Graph
- Node Symmetric Graph
- Permutation Star Graph
- Poincaré Conjecture (modified)
- Star Graph (modified)
- Vertex Symmetric Graph
- Vertex-Transitive Graph (modified)

### Saturday December 4, 2010

- Collatz Problem (modified)

### Wednesday December 1, 2010

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