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SLEPc: Scalable Library for Eigenvalue Problem Computations
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:Authors:      Jose E. Roman, Carmen Campos, Eloy Romero, Andres Tomas
:Organization: Universitat Politecnica de Valencia, Spain
:Website:      http://slepc.upv.es
:Contact:      slepc-maint@upv.es


Overview
--------

SLEPc, the Scalable Library for Eigenvalue Problem Computations, is a software
package for  the  solution of *large sparse eigenvalue problems*  on  parallel
computers. It  can be used for the solution of problems formulated  in  either
standard  or  generalized form, as well as other related problems such as  the
singular value decomposition and the nonlinear eigenproblem.

The  emphasis  of the software is on methods and  techniques  appropriate  for
problems in which the  associated matrices are sparse. Therefore, most of  the
methods offered by the library are projection methods such as Krylov-Schur  or
Jacobi-Davidson. It also provides built-in support for spectral transformation
such as shift-and-invert.

SLEPc is built on top of PETSc_ the Portable Extensible Toolkit for Scientific
Computation.  It  can be considered an extension of PETSc  providing  all  the
functionality necessary for the solution of eigenvalue problems.

.. _PETSc:    http://www.mcs.anl.gov/petsc/

Documentation
-------------

The  Users Manual as well as the HTML man pages for the detailed reference  of
each individual SLEPc routines are included in the SLEPc distribution and  can
also be found at the SLEPc `online documentation`_.

.. _online documentation:    http://slepc.upv.es/documentation

The  main reference for SLEPc is the following paper (see other references  at
the SLEPc website):

- V. Hernandez, J. E. Roman, and V. Vidal,  *SLEPc:  A  Scalable  and Flexible
  Flexible Toolkit for the Solution of Eigenvalue Problems*,  ACM Trans. Math.
  Softw. 31, pp. 351-362 (2005). [DOI_]

.. _DOI:    http://dx.doi.org/10.1145%2F1089014.1089019


Installation
------------

The installation procedure of SLEPc is very similar to that of PETSc. Briefly,
the environment variables ``$SLEPC_DIR`` and ``$PETSC_DIR`` must be set,  then
the script ``configure`` is executed and finally the libraries are built  with
the command ``make``. More details can be found in the Users Manual or in  the
online `installation instructions`_.

.. _installation instructions: http://slepc.upv.es/documentation/instal.htm


Funding
-------

The development of SLEPc has been partially supported by the following grants:

- Oficina de Ciencia i Tecnologia, Generalitat Valenciana, CTIDB/2002/54.
- Direccio  General d'Investigacio i Transferencia de  Tecnologia, Generalitat
  Valenciana, GV06/091.
- Ministerio de Ciencia e Innovacion, TIN2009-07519.
- Ministerio de Economia y Competitividad, TIN2013-41049-P.


Conditions of Use
-----------------

Copyright (c) 2002-2015, Universitat Politecnica de Valencia, Spain

   SLEPc is free software: you can redistribute it and/or modify it under  the
   terms of version 3 of the GNU Lesser General Public License as published by
   the Free Software Foundation.

   SLEPc  is  distributed in the hope that it will be useful, but WITHOUT  ANY
   WARRANTY;  without even the implied warranty of MERCHANTABILITY or  FITNESS
   FOR  A  PARTICULAR PURPOSE. See the GNU Lesser General Public  License  for
   more details.

   You  should have received a copy of the GNU Lesser General  Public  License
   along with SLEPc. If not, see <http://www.gnu.org/licenses/>.

