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.
Sum of diagonal of a square matrix
Is it a number?
Compare two input matrices
Divisible by 5
Rule of mixtures (composites) - either bound
Weighted Gold/Silver Standard
Scrabble Scores - 6
Stress-Strain Properties - 3
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