SlepcCompareLargestReal#

An eigenvalue comparison function used to sort with respect to largest real part.

Synopsis#

#include "slepcsys.h" 
PetscErrorCode SlepcCompareLargestReal(PetscScalar ar,PetscScalar ai,PetscScalar br,PetscScalar bi,PetscInt *result,PetscCtx ctx)

Logically Collective

Input Parameters#

  • ar - real part of the 1st eigenvalue

  • ai - imaginary part of the 1st eigenvalue

  • br - real part of the 2nd eigenvalue

  • bi - imaginary part of the 2nd eigenvalue

  • ctx - user-defined context, not used here

Output Parameter#

  • result - result of comparison

Note#

The result is 1 if \(\mathrm{Re}(\lambda_1)<\mathrm{Re}(\lambda_2)\).

See Also#

SlepcEigenvalueComparisonFn, SlepcSCCompare(), SlepcSC

Level#

developer

Location#

src/sys/slepcsc.c

Examples#

src/sys/classes/ds/tests/test15.c
src/sys/classes/ds/tests/test21.c
src/sys/classes/ds/tests/test22.c
src/sys/classes/ds/tests/test24.c
src/sys/classes/ds/tests/test26.c
src/sys/classes/ds/tests/test27.c
src/sys/classes/ds/tests/test7.c
src/sys/classes/ds/tests/test8.c

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