Supplements to Articles Published in

2011

For Stephen M. Walk's The Intermediate Value Theorem is NOT Obvious—and I AM Going to Prove It to You (September): Proofs Leading to the Intermediate Value Theorem (pdf)

For Michael A. Jones' Chutes and Ladders for the Impatient (January), MAPLE file.

2010

For Richard Kreminski's, Taylor’s theorem: the elusive c is not so elusive (May):

Proofs of Theorems 2 and 3, plus other materials(pdf)

For Rick Mabry’s The Hardest Straight-in Pool Shot (January), proofs of all nine FACTS, written on napkins. Separate napkins (pdfs):

Facts 1-3
Fact 4
Fact 5
Fact 6
Fact 7
Fact 8
Fact 9

All the napkins in one wad: Facts 1-9

2009

For Barry Cox and Stan Wagon’s Mechanical Circle-Squaring (September, pp 238-247), Mathematica generated simulations:

Geneva Drive Maltese Cross
Drilling a Square Hole
Drilling a Square Hole (Three Dimensions)
Drilling a Hexagonal Hole