What is the relation between BLAS, LAPACK and ATLAS

Question

I don\'t understand how BLAS, LAPACK and ATLAS are related and how I should use them together! I have been looking through all of their manuals and I have a general idea of BLAS

Answer 1

As far as I'm aware, and after working through the ATLAS repository, it seems that it includes a re-implementation of BLAS in C. There's bit more to it than that but I hope it answers the question.