STSHIFT — SLEPc 3.25.0 documentation

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# STSHIFT

STSHIFT = “shift” - A shift of origin, where the spectrum is shifted by a constant amount.

## Notes

The operator in this `ST` is \(B^{-1}A-\sigma I\), where \(A\) and \(B\) are the matrices set with `STSetMatrices()` and the shift \(\sigma\) is given in `STSetShift()`.

This is the default `ST`. If no shift is given, the default is \(\sigma=0\), i.e., no transformation.

## See Also

ST: Spectral Transformation, `ST`, `STType`, `STSetType()`, `STSetMatrices()`, `STSetShift()`

## Level

beginner

## Location

src/sys/classes/st/impls/shift/shift.c

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