Software expmARPACK: computing matrix exponential actions with Arnoldi methods

Version 2.0.1 (released December 2018): Arnoldi methods with residual-based stopping criterion and RT (residual-time) restarting as proposed in https://doi.org/10.1016/j.cam.2019.06.027 and https://arxiv.org/abs/1812.10165.

Version 1.0 (released September 2012): Arnoldi methods with residual-based stopping criterion.