Mathematics Magazine

Contents for December 1998

ARTICLES

The Newest Inductee in the Number Hall of Fame
by Colin C. Adams

The Crossing Number of C_m x C_n: A Reluctant Induction
by Nadine C. Myers

Leibniz's Formula, Cauchy Majorants, and Linear Differential Equations
by Michael Mezzino and Mark Pinsky

NOTES

Will the Real Non-Euclidean Parabola Please Stand Up?
by Michael Henle

Math Bite: The Volume of a Cone, Without Calculus or Square Roots
by Vaughan Pratt

Proof Without Words: The Length of a Polygonal Arch
by Philip Mallinson

The Incredibly Knotty Checkerboard Challenge
by Louis Zulli

Proof Without Words: Double Angle Formulas
by Yihnan David Gau

Two Diophantine Equations Studied by Ramanujan
by Michael D. Hirschhorn

PROBLEMS

Quickies 885-886

Solutions 1534-1538

Answers 885-886

REVIEWS

NEWS AND LETTERS

Index to Volume 71