the distance between BLAS and mathematics is quite big. Have you had a look at, for example, the Eigen library? Although it's still more verbose than math nota

the distance between BLAS and mathematics is quite big. Have you had a look at, for example, the Eigen library? Although it's still more verbose than math notation, it stays much closer and, in my experience, does allow for nearly all the optimization-wiggle-room one could want.