Subroutines in LAPACK have a naming Conference which makes the identifiers quite compact. This was necessary as the main Fortran expectations only supported identifiers up to 6 people extended, so the names had to be shortened to fit into this Restrict.[2]: "Naming Scheme" So Why don't you take a chance https://louismxfms.blogdomago.com/26300590/fascination-about-lapak77