Get your favorite
out-of-print math book back in print!

Pseudoku puzzles that I composed
for the 7th
Gathering for Gardner

G. W. Peck's version of Galvin's proof
of the Dinitz Conjecture

A beginner’s guide to forcing
(an improved version of
Forcing for dummies)

*You*
could have invented spectral sequences! and
corrigendum.
(This supersedes an earlier version of this document.)

Proof that 1 = 0
(nicer than the standard division-by-zero proofs)

Bill
Gates once published a math paper?!

What is
class field theory?

What is
Polya’s counting theorem?

What are
p-adic numbers?

Why does
no factor of *n*^{2} – 5 end in 3 or 7?

Consistency
is a piddling condition!

You
can’t do that! (Illegal
manipulation of regular expressions)

Tests
for divisibility by seven

Trivial
or non-trivial? (Dinitz conjecture)

**Sci.math.research
archive**

Girls’ Angle:
A Math Club for Girls

The Museum of Mathematics
and the associated
Math Midway

Erik
Seligman’s Math Mutation Podcasts

The Open Problem Garden

Math Delights

Surviving
Graduate School

General Relativity
Tutorial (John Baez)

Duluth Summer Research
Experience for Undergraduates

Michigan Math
Scholars

Jeff Weeks’s Topology and
Geometry Software

Neil
J. A. Sloane’s On-Line Encyclopedia of Integer Sequences

Inverse
Symbolic Calculator

Linear
Programming FAQ

TeX Users Group

Electronic
Journal of Combinatorics and World Combinatorics Exchange

Number Theory Web

American Mathematical Society

Mathematical Association of America

National Council of Teachers of
Mathematics

Mathematically
Correct