Any notation for component-by-component vector multiplication?

AlexChandler

Oh yes... the superscript T means transpose. Treat grad T as a 3 X 1 matrix, and k also as a 3 X 1 matrix. I₃ is just the identity matrix for R³.

AlexChandler	Oh yes... the superscript T means transpose. Treat grad T as a 3 X 1 matrix, and k also as a 3 X 1 matrix. I₃ is just the identity matrix for R³.