STSetBalanceMatrix#

Sets the diagonal matrix to be used for balancing.

Synopsis#

#include "slepcst.h" 
PetscErrorCode STSetBalanceMatrix(ST st,Vec D)

Collective

Input Parameters#

  • st - the spectral transformation context

  • D - the diagonal matrix (represented as a vector)

Notes#

If this matrix is set, STApply() will effectively apply \(D K^{-1} M D^{-1}\), see discussion at STGetOperator(). Use NULL to reset a previously passed D.

Balancing is usually set via EPSSetBalance(), but the advanced user may use this function to bypass the usual balancing methods.

See Also#

ST: Spectral Transformation, EPSSetBalance(), STApply(), STGetBalanceMatrix(), STGetOperator()

Level#

developer

Location#

src/sys/classes/st/interface/stfunc.c

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