slepc-3.7.4 2017-05-17
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# STComputeExplicitOperator

Computes the explicit operator associated to the eigenvalue problem with the specified spectral transformation.

### Synopsis

    #include "slepcst.h"
    PetscErrorCode STComputeExplicitOperator(ST st,Mat *mat)

Collective on ST

### Input Parameter

| st | - the spectral transform context

### Output Parameter

| mat | - the explicit operator

### Notes

This routine builds a matrix containing the explicit operator. For example, in generalized problems with shift-and-invert spectral transformation the result would be matrix (A - s B)^-1 B.

This computation is done by applying the operator to columns of the identity matrix. This is analogous to MatComputeExplicitOperator().

### See Also

STApply()

Location: src/sys/classes/st/interface/stsolve.c
Index of all ST routines
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Index of all manual pages