ARTICLES
The Lengthening Shadow: The Story of Related Rates
by Bill Austin, Don Barry, and David Berman
Proof Without Words: Self-Complementary Graphs
by Stephan C. Carlson
Chaotic Results for a Triangular Map of the Square
by Ben Shanfelder and Annalisa Crannell
On Minimum Spanning Trees and Determinants
by Perrin Wright
NOTES
Dinner, Dancing, and Tennis, Anyone?
by James N. Brawner
Variations on a Theme: A, Definitely Has No Subgroup of Order Six!
by Michael Brennan and Des MacHale
A Principle of Countability
by Robert Kantrowitz
Math Bite: The Dagwood Random Nap
by W. D. Kaigh and Wilke D. English
A Combinatorial Approach to Sums of Integer Powers
by George Mackiw
Rounding Errors to Knock Your Stocks Off
by Yves Nievergelt False Conjecture is True ne-Way, by Zachary Al. I Franco
Triangles With Integer Sides, Revisited
by Michael D. Hirschhorn
Matti Bite: Enumerating Certain Sparse Matrices
by David Callan
How Many Magic Squares Are There?
by Carl Libis, J. D. Phillips, and Mike Spa//
Proof Without Words: Pythagorean Runs
by Michael Boardman
Shortest Shoelaces
by Daniel C. Isaksen
PROBLEMS
Proposals 1589-1593
Quickies 897- 898
Solutions 1-564- 1-568
Answers 897-898
REVIEWS
NEWS AND LETTERS
60th Annual William Lowell Putnam Mathematical Competition