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esolver(1)		       Utility Commands			    esolver(1)

NAME
       esolver	-  eigensolver	for  standard eigenvalue problems (Ritz	values
       only)

SYNOPSIS
       esolver matrix_filename evalues_filename	[options]

DESCRIPTION
       This program inputs the matrix data from	matrix_filename	and solves the
       standard	 eigenvalue problem A*x	= l*x with the solver specified	by op-
       tions.  It outputs the specified	number of Ritz values, the  number  of
       which  is  given	by option -ss, to evalues_filename in the extended Ma-
       trix Market format (see Appendix	of Lis User Guide).  Both  the	Matrix
       Market  format  and the Harwell-Boeing format are supported for the ma-
       trix filename.

OPTIONS
       The following options are supported:

       -e eigensolver
	      The following options are	supported for eigensolver:

	      -e {li|7}
		     Lanczos

		     -ss [1]
			    The	size of	the subspace

	      -e {ai|8}
		     Arnoldi

		     -ss [1]
			    The	size of	the subspace

       Other Options for eigensolver:

       -eprint [0]
	      The output of the	residual history

	      -eprint {none|0}
		     None

	      -eprint {mem|1}
		     Save the residual history

	      -eprint {out|2}
		     Output it to the standard output

	      -eprint {all|3}
		     Save the residual history and output it to	 the  standard
		     output

       -omp_num_threads	[t]
	      The  number  of  the threads (t represents the maximum number of
	      the threads)

       -estorage [0]
	      The matrix storage format

       -estorage_block [2]
	      The block	size of	the BSR	and BSC	formats

       -ef [0]
	      The precision of the eigensolver

	      -ef {double|0}
		     Double precision

	      -ef {quad|1}
		     Double-double (quadruple) precision

       See Lis User Guide for full description.

EXIT STATUS
       The following exit values are returned:

       0      The process is normally terminated

       unspecified
	      An error occurred

SEE ALSO
       lis(3), lsolve(1),  esolve(1),  hpcg_kernel(1),	hpcg_spmvtest(1),  sp-
       mvtest1(1),  spmvtest2(1),  spmvtest2b(1), spmvtest3(1),	spmvtest3b(1),
       spmvtest4(1), spmvtest5(1)

       http://www.ssisc.org/lis/
       http://math.nist.gov/MatrixMarket/

Man Page			  4 Nov	2017			    esolver(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXIT STATUS | SEE ALSO

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