Hello, everyone. I am writing a C code that uses quite a lot of matrix operations. I have written my own functions for matrix-matrix multiplication, hadamard (direct) and kronecker products. However, I am sure using BLAS will greatly enhance speed. I did quite a large search and found that I can use 'dgenn' for matrix-matrix multiplication and 'dhrrrr' for hadamard product (will always use double precision). On the other hand, I could not find a function to do the kronecker product. Any hints? I tried to send this message ro R-devel, but always got a message saying it was rejected by filter match. Don't know what's wrong... Thank you in advance, Gabriel Margarido.