New in MathWorld -- February 2007

Wednesday February 28, 2007

Graph Crossing Number (modified)

Tuesday February 27, 2007

Heawood Graph (modified)
Petersen Graph (modified)

Monday February 26, 2007

Integer Sequence Primes (modified)
Perrin Sequence (modified)
Sylvester Matrix (modified)

Sunday February 25, 2007

Identity Graph (modified)

Saturday February 24, 2007

Dürer's Solid (modified)
Escher's Solid (modified)
Euler-Mascheroni Integrals (modified)
Jessen's Orthogonal Icosahedron (modified)
Spikey (modified)

Monday February 19, 2007

2 (modified)
Integer Sequence Primes (modified)
Lucas Number (modified)
Lucas Pseudoprime (modified)
Perrin Sequence (modified)
Tesseract (modified)
Waring's Problem (modified)

Saturday February 17, 2007

24-Cell (modified)
Bellows Conjecture (modified)
Eyeball Theorem (modified)
Harmonic Number (modified)
Integer Sequence Primes (modified)

Monday February 5, 2007

Integer Sequence Primes (modified)
Perrin Sequence (modified)

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