Main page:
User Guide:
https://arxiv.org/pdf/2002.04807
I don’t know, but maybe the implementation would be relatively simple (replace old ARPACK?):
* Driver interfaces for dense (using LAPACK), banded (using [SPIKE](http://www.spike-solver.org/)), and sparse-CSR formats (using MKL-PARDISO);
* IFEAST- FEAST w/o factorization for sparse-CSR drivers (using BiCGStab);
* PFEAST- FEAST using 3 levels of MPI parallelism for HPC (MPI solvers includes MKL-Cluster- PARDISO and PBiCGStab); Sparse and RCI interfaces compatible with local row-distributed data.