Subroutines in LAPACK have a naming Conference that makes the identifiers quite compact. This was needed as the first Fortran specifications only supported identifiers up to six people very long, And so the names had to be shortened to fit into this limit.[2]: "Naming Scheme" So Why don't you choose https://elliotwzxus.blazingblog.com/26767227/considerations-to-know-about-slot-lapak77