User talk:Coobit

Hi, about M (matrix of tranformation)

Look here. https://en.wikipedia.org/wiki/Cartesian_tensor

"A vector is invariant under any change of basis, so if coordinates transform according to a transformation matrix L, the bases transform according to the matrix inverse L−1, and conversely if the coordinates transform according to inverse L−1, the bases transform according to the matrix L."

So there should be M to the -1 power somewhere!!!