libisajet758-3-gfortran 20061220+dfsg3-3.1build3 (armhf binary) in ubuntu focal

 ISAJET is a Monte Carlo library which simulates p-p, pbar-p, and e+ e-
 interactions at high energies. The library is based on perturbative QCD
 combined with phenomenological models for parton and beam jet fragmentation.
 ISAJET incorporates ISASUSY, which evaluates branching ratios for the minimal
 supersymmetric extension of the Standard Model.
 .
 Note that in order to compile and link programs against this library, you
 must also install the libisajet758-3-dev package.