gsl-bin 2.5+dfsg-6 (riscv64 binary) in ubuntu focal

 The GNU Scientific Library (GSL) is a collection of routines for
 numerical analysis. The routines are written from scratch by the GSL
 team in C, and present a modern API for C programmers, while allowing
 wrappers to be written for very high level languages.
 .
 This package provides several example binaries.
 .
 URL: http://www.gnu.org/software/gsl/