SF_SP_LINALG

Description

SciFortran module for Arpack/Lanczos diagonalization

Quick access

Routines:

sp_eigh(), sp_lanc_eigh(), sp_lanc_tridiag(), sp_dvdson_eigh()

Used modules

• sf_misc: SciFortran module for sundry functions

  • assert_shape()

• sf_random: SciFortran module for RNG

  • mt_random()

• sf_linalg: SciFortran module for linear algebra

  • eye()

  • eigh()

• sf_mpi: SciFortran MPI interface

Subroutines and functions

interface  sf_sp_linalg/sp_eigh(matvec, eval, evec, mpicomm[, nblock, nitermax, bmat, v0, tol, iverbose, vrandom])

Parameters:

• matvec [external]

• eval (•) [real]

• evec (•, •) [real, complex, in,required]

• mpicomm [integer]

Options:

• nblock [integer]

• nitermax [integer]

• bmat [character(len=1)]

• v0 (size(evec, 1)) [real, complex]

• tol [real]

• iverbose [logical]

• vrandom [logical]

interface  sf_sp_linalg/sp_lanc_eigh(matvec, egs, vect, nitermax, mpicomm[, iverbose, threshold, ncheck, vrandom])

Parameters:

• matvec [external]

• egs [real]

• vect (•) [real, complex]

• nitermax [integer]

• mpicomm [integer]

Options:

• iverbose [logical]

• threshold [real]

• ncheck [integer]

• vrandom [logical]

interface  sf_sp_linalg/sp_lanc_tridiag(matvec, vin, alanc, blanc, mpicomm[, threshold])

Parameters:

• matvec [external]

• vin (•) [real, complex, inout]

• alanc (•) [real, inout/in,required]

• blanc (size(alanc)) [real, inout]

• mpicomm [integer]

Options:

threshold [real]

interface  sf_sp_linalg/sp_dvdson_eigh(matvec, eval, evec[, nblock, nitermax, tol])

Parameters:

• matvec [external]

• eval (•) [real, inout]

• evec (•, •) [real, inout]

Options:

• nblock [integer]

• nitermax [integer]

• tol [real]