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Homework Statement
Ok so
I have to construct a real symmetric matrix R whose eigenvalues are 2,1,-2 and who corresponding normalized eigenvectors are bla bla bla..
So let the matrix of eigenvalues down diagonal be E and matrix of eigen vectors be V
Is R = VEV^T or R = V^TEV??
How am i meant to know..? Different books are saying different things!
In my notes it says that for unitary U, A = Udagger A' U where A' is the diagonalised matrix, but elsewhere it says the opposite! ahhhh