This may be a really basic question, but I am having troubles multiplying two complex matrices. Mathematica 7 installed on my computer has been performing all the matrix computations fine for real matrices, but it is not working with complex matrices. I checked that my Mathematica can take a dot product of two complex vectors. But none of the functions (Dot, Inverse, JordanDecomposition, Transpose) seem to work. When I apply Inverse for example, I get an output "Inverse[A]" for whatever matrix A I put in.