mpb-mpi 1.9.0-2 (riscv64 binary) in ubuntu focal

 The MIT Photonic-Bands package is a free program for computing the band
 structures (dispersion relations) and electromagnetic modes of periodic
 dielectric structures, on both serial and parallel computers. It was
 developed by Steven G. Johnson at MIT in the Joannopoulos Ab Initio
 Physics group, and designed to study photonic crystal structures.
 .
 This package contains a parallel version of MPB, using the mpich
 implementation of the MPI protocol. It allows for calculations on
 clusters of computers.