Eigen Relative tolerance

Eigen Relative tolerance = <float>

Description/Usage

This optional card specifies the relative residual tolerance used in the ARPACK eigensolver. Valid input are defined as:

tol>=0.0

The relative termination criterion used within the eigensolver.

The default value of tol is 1.0e-6.

Examples

Here is a sample card:

Eigen Relative tolerance = 1.0e-10

Technical Discussion

The value of tol specifies a termination condition used within the eigensolver which is applied to the transformed eigensystem. The correspondence of “internal residual” to “error in eigenpair” is even more difficult with the generalized eigenvalue problem than “residual” to “error in solution vector” with regular linear solvers.

This card is not applicable to the eggroll eigensolver, whose tolerance is specified with the Eigen Tolerance card.

Theory

No Theory.

FAQs

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References

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