Mathematics Magazine - October 1997

ARTICLES

The Faces of the Tri-Hexaflexagon
by Peter Hilton, Jean Pedersen, and Hans Walser

Centers of Triangles of Fixed Center: Adventures in Undergraduate Research
by William Mueller

A Family Portrait of Primes--A Case Study in Discrimination
by Shailesh A. Shirali

Mathematics Teachers
by JoAnne Growney

Halley's Comment--Projectiles With Linear Resistance
by C. W. Groetsch and Barry Cipra

Carl B. Allendoerfer Awards--1997

NOTES

Scheduling a Bridge Club Using a Genetic Algorithm
by R. J. Simpson

Scheduling a Bridge Club by Tabu Search
by Luis B. Morales

Arg
by John A. Baker and Willem Sluis

Math Bite
by Doron Zeilberger

Understanding the Extra Power of the Newton-Cotes Formula for Even Degree
by Kenneth J. Supowit

Proof Without Words: Sums of Consecutive Positive Integers
by C. L. Frenzen

The Volume of a Cone, Without Calculus
by M. Hirschhorn

A Basis for the Intersection of Subspaces
by Kung-Wei Yang

PROBLEMS

Proposals 1529-1533

Quickies 868-870

Solutions 1504-1508

Answers 868-870

REVIEWS

NEWS AND LETTERS

The Root and Ratio Tests Revisited