math/arpack-ng 3.9.1 NetBSD

ARPACK-NG is a collection of Fortran77 subroutines designed to solve large scale eigenvalue problems.

Important Features:

o  Reverse Communication Interface.
o  Single and Double Precision Real Arithmetic Versions for Symmetric,
   Non-symmetric, Standard or Generalized Problems.
o  Single and Double Precision Complex Arithmetic Versions for Standard
   or Generalized Problems.
o  Routines for Banded Matrices - Standard or Generalized Problems.
o  Routines for The Singular Value Decomposition.
o  Example driver routines that may be used as templates to implement
   numerous Shift-Invert strategies for all problem types, data types
   and precision.
o  ILP64 support

No arpack release has been published by Rice University for many years, and arpack-ng aims to provide a common repository of community fixes with a testsuite.