/*
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/*
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This file implements a wrapper to the TRLAN package
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This file implements a wrapper to the TRLAN package
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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SLEPc - Scalable Library for Eigenvalue Problem Computations
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SLEPc - Scalable Library for Eigenvalue Problem Computations
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Copyright (c) 2002-2010, Universidad Politecnica de Valencia, Spain
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Copyright (c) 2002-2010, Universidad Politecnica de Valencia, Spain
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This file is part of SLEPc.
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This file is part of SLEPc.
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SLEPc is free software: you can redistribute it and/or modify it under the
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SLEPc is free software: you can redistribute it and/or modify it under the
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terms of version 3 of the GNU Lesser General Public License as published by
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terms of version 3 of the GNU Lesser General Public License as published by
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the Free Software Foundation.
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the Free Software Foundation.
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SLEPc is distributed in the hope that it will be useful, but WITHOUT ANY
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SLEPc is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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more details.
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You should have received a copy of the GNU Lesser General Public License
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You should have received a copy of the GNU Lesser General Public License
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along with SLEPc. If not, see <http://www.gnu.org/licenses/>.
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along with SLEPc. If not, see <http://www.gnu.org/licenses/>.
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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*/
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*/
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#include <private/epsimpl.h> /*I "slepceps.h" I*/
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#include <private/epsimpl.h> /*I "slepceps.h" I*/
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#include <../src/eps/impls/external/trlan/trlanp.h>
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#include <../src/eps/impls/external/trlan/trlanp.h>
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PetscErrorCode EPSSolve_TRLAN(EPS);
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PetscErrorCode EPSSolve_TRLAN(EPS);
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/* Nasty global variable to access EPS data from TRLan_ */
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/* Nasty global variable to access EPS data from TRLan_ */
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static EPS globaleps;
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static EPS globaleps;
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#undef __FUNCT__
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#undef __FUNCT__
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#define __FUNCT__ "EPSSetUp_TRLAN"
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#define __FUNCT__ "EPSSetUp_TRLAN"
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PetscErrorCode EPSSetUp_TRLAN(EPS eps)
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PetscErrorCode EPSSetUp_TRLAN(EPS eps)
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{
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{
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PetscErrorCode ierr;
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PetscErrorCode ierr;
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EPS_TRLAN *tr = (EPS_TRLAN *)eps->data;
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EPS_TRLAN *tr = (EPS_TRLAN *)eps->data;
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PetscFunctionBegin;
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PetscFunctionBegin;
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if (eps->ncv) {
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if (eps->ncv) {
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if (eps->ncv<eps->nev) SETERRQ(((PetscObject)eps)->comm,1,"The value of ncv must be at least nev");
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if (eps->ncv<eps->nev) SETERRQ(((PetscObject)eps)->comm,1,"The value of ncv must be at least nev");
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}
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}
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else eps->ncv = eps->nev;
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else eps->ncv = eps->nev;
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if (eps->mpd) PetscInfo(eps,"Warning: parameter mpd ignored\n");
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if (eps->mpd) PetscInfo(eps,"Warning: parameter mpd ignored\n");
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if (!eps->max_it) eps->max_it = PetscMax(1000,eps->n);
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if (!eps->max_it) eps->max_it = PetscMax(1000,eps->n);
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if (!eps->ishermitian)
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if (!eps->ishermitian)
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SETERRQ(((PetscObject)eps)->comm,PETSC_ERR_SUP,"Requested method is only available for Hermitian problems");
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SETERRQ(((PetscObject)eps)->comm,PETSC_ERR_SUP,"Requested method is only available for Hermitian problems");
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if (eps->isgeneralized)
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if (eps->isgeneralized)
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SETERRQ(((PetscObject)eps)->comm,PETSC_ERR_SUP,"Requested method is not available for generalized problems");
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SETERRQ(((PetscObject)eps)->comm,PETSC_ERR_SUP,"Requested method is not available for generalized problems");
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if (!eps->which) eps->which = EPS_LARGEST_REAL;
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if (!eps->which) eps->which = EPS_LARGEST_REAL;
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if (eps->which!=EPS_LARGEST_REAL && eps->which!=EPS_SMALLEST_REAL && eps->which!=EPS_TARGET_REAL)
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if (eps->which!=EPS_LARGEST_REAL && eps->which!=EPS_SMALLEST_REAL && eps->which!=EPS_TARGET_REAL)
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SETERRQ(((PetscObject)eps)->comm,1,"Wrong value of eps->which");
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SETERRQ(((PetscObject)eps)->comm,1,"Wrong value of eps->which");
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tr->restart = 0;
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tr->restart = 0;
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tr->maxlan = PetscBLASIntCast(eps->nev+PetscMin(eps->nev,6));
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tr->maxlan = PetscBLASIntCast(eps->nev+PetscMin(eps->nev,6));
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if (tr->maxlan+1-eps->ncv<=0) { tr->lwork = PetscBLASIntCast(tr->maxlan*(tr->maxlan+10)); }
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if (tr->maxlan+1-eps->ncv<=0) { tr->lwork = PetscBLASIntCast(tr->maxlan*(tr->maxlan+10)); }
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else { tr->lwork = PetscBLASIntCast(eps->nloc*(tr->maxlan+1-eps->ncv) + tr->maxlan*(tr->maxlan+10)); }
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else { tr->lwork = PetscBLASIntCast(eps->nloc*(tr->maxlan+1-eps->ncv) + tr->maxlan*(tr->maxlan+10)); }
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ierr = PetscMalloc(tr->lwork*sizeof(PetscReal),&tr->work);CHKERRQ(ierr);
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ierr = PetscMalloc(tr->lwork*sizeof(PetscReal),&tr->work);CHKERRQ(ierr);
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if (eps->extraction) {
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if (eps->extraction) {
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ierr = PetscInfo(eps,"Warning: extraction type ignored\n");CHKERRQ(ierr);
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ierr = PetscInfo(eps,"Warning: extraction type ignored\n");CHKERRQ(ierr);
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}
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}
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ierr = EPSAllocateSolution(eps);CHKERRQ(ierr);
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ierr = EPSAllocateSolution(eps);CHKERRQ(ierr);
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/* dispatch solve method */
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/* dispatch solve method */
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if (eps->leftvecs) SETERRQ(((PetscObject)eps)->comm,PETSC_ERR_SUP,"Left vectors not supported in this solver");
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if (eps->leftvecs) SETERRQ(((PetscObject)eps)->comm,PETSC_ERR_SUP,"Left vectors not supported in this solver");
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eps->ops->solve = EPSSolve_TRLAN;
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eps->ops->solve = EPSSolve_TRLAN;
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PetscFunctionReturn(0);
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PetscFunctionReturn(0);
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}
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}
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#undef __FUNCT__
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#undef __FUNCT__
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#define __FUNCT__ "MatMult_TRLAN"
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#define __FUNCT__ "MatMult_TRLAN"
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static PetscBLASInt MatMult_TRLAN(PetscBLASInt *n,PetscBLASInt *m,PetscReal *xin,PetscBLASInt *ldx,PetscReal *yout,PetscBLASInt *ldy)
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static PetscBLASInt MatMult_TRLAN(PetscBLASInt *n,PetscBLASInt *m,PetscReal *xin,PetscBLASInt *ldx,PetscReal *yout,PetscBLASInt *ldy)
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{
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{
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PetscErrorCode ierr;
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PetscErrorCode ierr;
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Vec x,y;
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Vec x,y;
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PetscBLASInt i;
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PetscBLASInt i;
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PetscFunctionBegin;
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PetscFunctionBegin;
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ierr = VecCreateMPIWithArray(((PetscObject)globaleps)->comm,*n,PETSC_DECIDE,PETSC_NULL,&x);CHKERRQ(ierr);
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ierr = VecCreateMPIWithArray(((PetscObject)globaleps)->comm,*n,PETSC_DECIDE,PETSC_NULL,&x);CHKERRQ(ierr);
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ierr = VecCreateMPIWithArray(((PetscObject)globaleps)->comm,*n,PETSC_DECIDE,PETSC_NULL,&y);CHKERRQ(ierr);
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ierr = VecCreateMPIWithArray(((PetscObject)globaleps)->comm,*n,PETSC_DECIDE,PETSC_NULL,&y);CHKERRQ(ierr);
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for (i=0;i<*m;i++) {
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for (i=0;i<*m;i++) {
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ierr = VecPlaceArray(x,(PetscScalar*)xin+i*(*ldx));CHKERRQ(ierr);
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ierr = VecPlaceArray(x,(PetscScalar*)xin+i*(*ldx));CHKERRQ(ierr);
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ierr = VecPlaceArray(y,(PetscScalar*)yout+i*(*ldy));CHKERRQ(ierr);
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ierr = VecPlaceArray(y,(PetscScalar*)yout+i*(*ldy));CHKERRQ(ierr);
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ierr = STApply(globaleps->OP,x,y);CHKERRQ(ierr);
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ierr = STApply(globaleps->OP,x,y);CHKERRQ(ierr);
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ierr = IPOrthogonalize(globaleps->ip,0,PETSC_NULL,globaleps->nds,PETSC_NULL,globaleps->DS,y,PETSC_NULL,PETSC_NULL,PETSC_NULL);CHKERRQ(ierr);
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ierr = IPOrthogonalize(globaleps->ip,0,PETSC_NULL,globaleps->nds,PETSC_NULL,globaleps->DS,y,PETSC_NULL,PETSC_NULL,PETSC_NULL);CHKERRQ(ierr);
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ierr = VecResetArray(x);CHKERRQ(ierr);
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ierr = VecResetArray(x);CHKERRQ(ierr);
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ierr = VecResetArray(y);CHKERRQ(ierr);
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ierr = VecResetArray(y);CHKERRQ(ierr);
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}
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}
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ierr = VecDestroy(&x);CHKERRQ(ierr);
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ierr = VecDestroy(&x);CHKERRQ(ierr);
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ierr = VecDestroy(&y);CHKERRQ(ierr);
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ierr = VecDestroy(&y);CHKERRQ(ierr);
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PetscFunctionReturn(0);
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PetscFunctionReturn(0);
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}
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}
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#undef __FUNCT__
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#undef __FUNCT__
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#define __FUNCT__ "EPSSolve_TRLAN"
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#define __FUNCT__ "EPSSolve_TRLAN"
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PetscErrorCode EPSSolve_TRLAN(EPS eps)
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PetscErrorCode EPSSolve_TRLAN(EPS eps)
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{
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{
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PetscErrorCode ierr;
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PetscErrorCode ierr;
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PetscInt i;
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PetscInt i;
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PetscBLASInt ipar[32], n, lohi, stat, ncv;
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PetscBLASInt ipar[32], n, lohi, stat, ncv;
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EPS_TRLAN *tr = (EPS_TRLAN *)eps->data;
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EPS_TRLAN *tr = (EPS_TRLAN *)eps->data;
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PetscScalar *pV;
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PetscScalar *pV;
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PetscFunctionBegin;
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PetscFunctionBegin;
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ncv = PetscBLASIntCast(eps->ncv);
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ncv = PetscBLASIntCast(eps->ncv);
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n = PetscBLASIntCast(eps->nloc);
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n = PetscBLASIntCast(eps->nloc);
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if (eps->which==EPS_LARGEST_REAL || eps->which==EPS_TARGET_REAL) lohi = 1;
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if (eps->which==EPS_LARGEST_REAL || eps->which==EPS_TARGET_REAL) lohi = 1;
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else if (eps->which==EPS_SMALLEST_REAL) lohi = -1;
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else if (eps->which==EPS_SMALLEST_REAL) lohi = -1;
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else SETERRQ(((PetscObject)eps)->comm,1,"Wrong value of eps->which");
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else SETERRQ(((PetscObject)eps)->comm,1,"Wrong value of eps->which");
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globaleps = eps;
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globaleps = eps;
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ipar[0] = 0; /* stat: error flag */
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ipar[0] = 0; /* stat: error flag */
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ipar[1] = lohi; /* smallest (lohi<0) or largest eigenvalues (lohi>0) */
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ipar[1] = lohi; /* smallest (lohi<0) or largest eigenvalues (lohi>0) */
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ipar[2] = PetscBLASIntCast(eps->nev); /* number of desired eigenpairs */
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ipar[2] = PetscBLASIntCast(eps->nev); /* number of desired eigenpairs */
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ipar[3] = 0; /* number of eigenpairs already converged */
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ipar[3] = 0; /* number of eigenpairs already converged */
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ipar[4] = tr->maxlan; /* maximum Lanczos basis size */
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ipar[4] = tr->maxlan; /* maximum Lanczos basis size */
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ipar[5] = tr->restart; /* restarting scheme */
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ipar[5] = tr->restart; /* restarting scheme */
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ipar[6] = PetscBLASIntCast(eps->max_it); /* maximum number of MATVECs */
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ipar[6] = PetscBLASIntCast(eps->max_it); /* maximum number of MATVECs */
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ipar[7] = PetscBLASIntCast(MPI_Comm_c2f(((PetscObject)eps)->comm)); /* communicator */
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ipar[7] = PetscBLASIntCast(MPI_Comm_c2f(((PetscObject)eps)->comm)); /* communicator */
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ipar[8] = 0; /* verboseness */
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ipar[8] = 0; /* verboseness */
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ipar[9] = 99; /* Fortran IO unit number used to write log messages */
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ipar[9] = 99; /* Fortran IO unit number used to write log messages */
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ipar[10] = 1; /* use supplied starting vector */
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ipar[10] = 1; /* use supplied starting vector */
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ipar[11] = 0; /* checkpointing flag */
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ipar[11] = 0; /* checkpointing flag */
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ipar[12] = 98; /* Fortran IO unit number used to write checkpoint files */
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ipar[12] = 98; /* Fortran IO unit number used to write checkpoint files */
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ipar[13] = 0; /* number of flops per matvec per PE (not used) */
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ipar[13] = 0; /* number of flops per matvec per PE (not used) */
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tr->work[0] = eps->tol; /* relative tolerance on residual norms */
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tr->work[0] = eps->tol; /* relative tolerance on residual norms */
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for (i=0;i<eps->ncv;i++) eps->eigr[i]=0.0;
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for (i=0;i<eps->ncv;i++) eps->eigr[i]=0.0;
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ierr = EPSGetStartVector(eps,0,eps->V[0],PETSC_NULL);CHKERRQ(ierr);
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ierr = EPSGetStartVector(eps,0,eps->V[0],PETSC_NULL);CHKERRQ(ierr);
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ierr = VecGetArray(eps->V[0],&pV);CHKERRQ(ierr);
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ierr = VecGetArray(eps->V[0],&pV);CHKERRQ(ierr);
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TRLan_ ( MatMult_TRLAN, ipar, &n, &ncv, eps->eigr, pV, &n, tr->work, &tr->lwork );
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TRLan_ ( MatMult_TRLAN, ipar, &n, &ncv, eps->eigr, pV, &n, tr->work, &tr->lwork );
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ierr = VecRestoreArray( eps->V[0], &pV );CHKERRQ(ierr);
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ierr = VecRestoreArray( eps->V[0], &pV );CHKERRQ(ierr);
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stat = ipar[0];
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stat = ipar[0];
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eps->nconv = ipar[3];
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eps->nconv = ipar[3];
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eps->its = ipar[25];
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eps->its = ipar[25];
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eps->reason = EPS_CONVERGED_TOL;
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eps->reason = EPS_CONVERGED_TOL;
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if (stat!=0) { SETERRQ1(((PetscObject)eps)->comm,PETSC_ERR_LIB,"Error in TRLAN (code=%d)",stat);}
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if (stat!=0) { SETERRQ1(((PetscObject)eps)->comm,PETSC_ERR_LIB,"Error in TRLAN (code=%d)",stat);}
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PetscFunctionReturn(0);
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PetscFunctionReturn(0);
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}
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}
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#undef __FUNCT__
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#undef __FUNCT__
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#define __FUNCT__ "EPSDestroy_TRLAN"
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#define __FUNCT__ "EPSDestroy_TRLAN"
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PetscErrorCode EPSDestroy_TRLAN(EPS eps)
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PetscErrorCode EPSDestroy_TRLAN(EPS eps)
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{
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{
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PetscErrorCode ierr;
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PetscErrorCode ierr;
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EPS_TRLAN *tr = (EPS_TRLAN *)eps->data;
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EPS_TRLAN *tr = (EPS_TRLAN *)eps->data;
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PetscFunctionBegin;
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PetscFunctionBegin;
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PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
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PetscValidHeaderSpecific(eps,EPS_CLASSID,1);
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ierr = PetscFree(tr->work);CHKERRQ(ierr);
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ierr = PetscFree(tr->work);CHKERRQ(ierr);
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ierr = PetscFree(eps->data);CHKERRQ(ierr);
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ierr = PetscFree(eps->data);CHKERRQ(ierr);
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ierr = EPSFreeSolution(eps);CHKERRQ(ierr);
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ierr = EPSFreeSolution(eps);CHKERRQ(ierr);
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PetscFunctionReturn(0);
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PetscFunctionReturn(0);
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}
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}
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EXTERN_C_BEGIN
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EXTERN_C_BEGIN
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#undef __FUNCT__
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#undef __FUNCT__
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#define __FUNCT__ "EPSCreate_TRLAN"
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#define __FUNCT__ "EPSCreate_TRLAN"
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PetscErrorCode EPSCreate_TRLAN(EPS eps)
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PetscErrorCode EPSCreate_TRLAN(EPS eps)
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{
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{
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PetscErrorCode ierr;
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PetscErrorCode ierr;
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EPS_TRLAN *trlan;
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PetscFunctionBegin;
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PetscFunctionBegin;
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ierr = PetscNew(EPS_TRLAN,&trlan);CHKERRQ(ierr);
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ierr = PetscNewLog(eps,EPS_TRLAN,&eps->data);CHKERRQ(ierr);
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PetscLogObjectMemory(eps,sizeof(EPS_TRLAN));
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eps->data = (void *) trlan;
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eps->ops->setup = EPSSetUp_TRLAN;
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eps->ops->setup = EPSSetUp_TRLAN;
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eps->ops->destroy = EPSDestroy_TRLAN;
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eps->ops->destroy = EPSDestroy_TRLAN;
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eps->ops->backtransform = EPSBackTransform_Default;
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eps->ops->backtransform = EPSBackTransform_Default;
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eps->ops->computevectors = EPSComputeVectors_Default;
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eps->ops->computevectors = EPSComputeVectors_Default;
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PetscFunctionReturn(0);
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PetscFunctionReturn(0);
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}
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}
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EXTERN_C_END
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EXTERN_C_END
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