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Jul 20, 2023

Thick-restart Lanczos method for eigenproblems

This portable, modular Fortran 90 software package implements the thick-restart Lanczos method, for use with real symmetric or complex Hermitian eigenvalue problems where a small number of eigevalues and eigenvectors are needed, and the matrices involved may be too large to store in computer memory. Most of the arithmetic computations in the software are done through calls to BLAS and LAPACK. The software can be instructed to write checkpoint files so that it can be restarted is a later time.

Checkout these related ports:
  • Zn_poly - C library for polynomial arithmetic
  • Zimpl - Language to translate the LP models into .lp or .mps
  • Zegrapher - Software for plotting mathematical objects
  • Zarray - Dynamically typed N-D expression system based on xtensor
  • Z3 - Z3 Theorem Prover
  • Yices - SMT solver
  • Yacas - Yet Another Computer Algebra System
  • Xtensor - Multi-dimensional arrays with broadcasting and lazy computing
  • Xtensor-python - Python bindings for xtensor
  • Xtensor-io - Xtensor plugin to read/write images, audio files, numpy npz and HDF5
  • Xtensor-blas - BLAS extension to xtensor
  • Xspread - Spreadsheet program for X and terminals
  • Xppaut - Graphical tool for solving differential equations, etc
  • Xplot - X11 plotting package
  • Xlife++ - XLiFE++ eXtended Library of Finite Elements in C++