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.
Rotate a Matrix by 90 degrees
Replace multiples of 5 with NaN
03 - Matrix Variables 6
Lights Out 20 - 4x4, x moves
Stress-Strain Properties - 2
Not square-free number sequence
Word Search Solver
Self-similarity 3 - Every other pair of terms
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