[petsc-users] reference, copy or constant view?

[Jed Brown]

Andrew Spott <ansp6066 at colorado.edu> writes:

> Thanks for the help regarding etags.  I used to have them set up, I’ll have to reconfigure them.
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>>Actually, do call ESPSetOperators so that EPS knows….
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> Unfortunately this just confused me more.  Am I reading this correctly in that doing:
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>             EPSSetOperators(eps, *A, PETSC_NULL);
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>             EPSSetProblemType(eps, EPS_HEP);
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>             EPSSetType(eps, EPSKRYLOVSCHUR);
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>             EPSSetWhichEigenpairs(eps,  EPS_TARGET_REAL);
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>             EPSSetTarget(eps, -0.903801);
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>             EPSSetDimensions(eps, 1000, PETSC_DEFAULT, PETSC_DEFAULT);
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>             EPSSetInitialSpace(eps,1,&eigenvector);
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>             EPSSolve(eps);
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> Won’t actually change *A?  

Correct.

> What about VecDot?

It does not change the vectors.
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