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.
Column norms of a matrix
Function composition - harder
Number of Horns on a unicorn!
Find out phase angle of second order system.
Rumis Scorer 4
Lights Out 14 - 5x5, four stages, x moves
Combined Ages 2 - Symmetric, n ≥ 3
Lights Out 34 - m x n x o, q stages, with wrapping, x moves
Divisible by 13
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