Write a function to determine whether or not the matrix is a projector. Projector matrices are defined as P^2 = P.
test 8 is not a symmetric matrix, is it a projector matrix?
Sorry about that one. I've removed that test case. I don't know how long it will take for the re-scoring to propagate, though.
Maximum running product for a string of numbers
Project Euler: Problem 4, Palindromic numbers
Back to basics 15 - Benchmark
String substitution, sub problem to cryptoMath
Stress-Strain Properties - 5
Scrabble Scores - 2
Lights Out 12 - 5x5, three stages, <7 moves
Lights Out 9 - 5x5, light-only solution? II
Divisible by 8
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