This header plots the critical line of the Riemann Zeta Function.  A complete understanding wins a $1,000,000 prize.
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Crossword Applets

62a -- An unthemed 15x15 with 62 words.
4x8 -- A 4x8 rectangle
14x16a -- an unthemed 14x16 crossword by Frank Longo
14x16b -- a greek themed 14x16 crossword by David Tuller
14x16c -- an unthemed 14x16 crossword by Craig Kasper
hexajig -- An Iamond based cryptic crossword by Roger Phillips

Xword -- some notes about crosswords.  If you like to write clues, please contact me.  I have a stack of puzzles that are constructed, but not clued.