# New in *MathWorld* -- December
2005

### Saturday December 31, 2005

- Riemann Zeta Function Zeros (modified)
- Xi-Function (modified)

### Thursday December 29, 2005

- Riemann Zeta Function Zeros (modified)

### Wednesday December 28, 2005

- Riemann Prime Counting Function (modified)

### Tuesday December 27, 2005

- Left Factorial (modified)

### Monday December 26, 2005

- Factorial (modified)
- Gamma Function (modified)
- Polynomial (modified)
- Riemann-Siegel Functions (modified)

### Sunday December 25, 2005

- Entire Function (modified)
- Integer Sequence Primes (modified)
- Jacobi Theta Functions (modified)
- Mersenne Prime (modified)
- Prime Number (modified)
- Riemann Hypothesis (modified)
- Riemann Zeta Function (modified)
- Titanic Prime (modified)
- Xi-Function (modified)

### Thursday December 22, 2005

- Hedgehog (modified)
- Integer Sequence Primes (modified)
- Normal Number (modified)
- Thâbit ibn Kurrah Number (modified)

### Wednesday December 21, 2005

- Bernoulli Number (modified)

### Sunday December 18, 2005

- Alon-Tarsi Conjecture (modified)
- Latin Square (modified)

### Friday December 16, 2005

- Benham's Wheel (modified)
- Graph Minor (modified)
- Jordan Curve Theorem (modified)
- Kobon Triangle (modified)
- Logarithmic Integral (modified)
- Prime-Generating Polynomial (modified)
- Pythagorean Triple (modified)
- RATS Sequence (modified)
- Refactorable Number (modified)
- Tau Number
- Unary Operation (modified)

### Thursday December 15, 2005

- Almost Integer (modified)
- Alon-Tarsi Conjecture
- Beraha Constants (modified)
- Diamond (modified)
- Erf (modified)
- Multiplicative Persistence (modified)
- Parallelepiped (modified)
- Sum-Product Number (modified)
- Totient Function (modified)

### Wednesday December 14, 2005

- Aztec Diamond
- Circle-Circle Intersection (modified)
- Cosine Circle (modified)
- Miquel Point (modified)
- Miquel Triangle (modified)
- Riemann Zeta Function (modified)
- Sine-Triple-Angle Circle (modified)
- Trilinear Coordinates (modified)

### Tuesday December 13, 2005

- Buffon-Laplace Needle Problem (modified)
- NAND (modified)

### Monday December 12, 2005

- Buffon's Needle Problem (modified)
- Consecutive Number Sequences (modified)
- Costa Minimal Surface (modified)
- EulerEquations
- Euler-Lagrange Differential Equation (modified)
- Hypotenuse (modified)
- Integer Sequence Primes (modified)
- Penrose Tiles (modified)
- Tiling (modified)
- Wilson's Theorem (modified)

### Wednesday December 7, 2005

- Euler-Mascheroni Constant (modified)
- Golden Ratio (modified)
- Kepler Conjecture (modified)
- Sphere Packing (modified)

### Tuesday December 6, 2005

- Cosine Circle (modified)
- Cyclotomic Polynomial (modified)
- Fibonacci Polynomial (modified)
- Incentral Triangle (modified)
- Legendre Symbol (modified)
- Lucas Polynomial (modified)
- Multiple Edge
- Perspector (modified)
- Perspectrix (modified)
- Pi Approximations (modified)
- Pi Continued Fraction (modified)
- Stieltjes Constants (modified)
- Time Series Analysis (modified)
- Unary Cofactor Triangle (modified)

### Monday December 5, 2005

- Angle Bisector (modified)
- Ellipse (modified)
- Gaussian Prime (modified)
- Symmedian (modified)
- Tribonacci Number (modified)

### Sunday December 4, 2005

- Circumellipse (modified)
- Ellipse (modified)
- Excentral-Hexyl Ellipse (modified)
- Inellipse (modified)
- MacBeath Circumconic (modified)
- MacBeath Inconic (modified)
- Mandart Inellipse (modified)
- Midpoint Ellipse (modified)
- Orthic Inconic (modified)
- Steiner Inellipse (modified)
- Tangent (modified)

### Saturday December 3, 2005

- Gröbner Basis (modified)
- Resultant (modified)

### Friday December 2, 2005

- Dirichlet's Box Principle (modified)
- L'Hospital's Rule (modified)
- Parallelian (modified)

### Thursday December 1, 2005

- Borel-Tanner Distribution
- Catalan Number (modified)
- Central Binomial Coefficient (modified)
- Delannoy Number (modified)
- Harmonic Number (modified)
- Lucas n-Step Number (modified)
- Modus Tollens
- Motzkin Number (modified)
- Schröder Number (modified)
- Supremum Norm
- Symmetric Group (modified)

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