liblapack64-3 3.9.0-1 (amd64 binary) in ubuntu focal

 LAPACK version 3.X is a comprehensive FORTRAN library that does
 linear algebra operations including matrix inversions, least
 squared solutions to linear sets of equations, eigenvector
 analysis, singular value decomposition, etc. It is a very
 comprehensive and reputable package that has found extensive
 use in the scientific community.
 .
 This package contains a shared version of the library.
 Compiled with Fortran option "-fdefault-integer-8".