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# ST_MATMODE_INPLACE

The coefficient matrix of the linear system, \(A-\sigma B\), is built explicitly overwritting \(A\).

## Note

This mode uses less memory than `ST_MATMODE_COPY`, but it modifies \(A\). This alteration of \(A\) is reversed after the eigensolution process has finished, but due to roundoff, the result might not be exactly equal to the original \(A\).

## See Also

ST: Spectral Transformation, `STMatMode`, `STSetMatMode()`, `ST_MATMODE_COPY`, `ST_MATMODE_SHELL`

## Level

intermediate

## Location

include/slepcst.h

Index of all ST routines Table of Contents for all manual pages Index of all manual pages