Subroutines in LAPACK Have got a naming convention which makes the identifiers quite compact. This was necessary as the 1st Fortran standards only supported identifiers up to 6 figures lengthy, so the names had to be shortened to suit into this limit.[2]: "Naming Scheme" e. it’s recent instead of dated. https://lapak7753826.suomiblog.com/what-does-lapak-77-mean-42171506