Opened 18 years ago
Closed 18 years ago
#39 closed upgrade (Fixed)
Number of Hessian eigenvectors
| Reported by: | arango | Owned by: | arango |
|---|---|---|---|
| Priority: | major | Milestone: | Adjoint Based Algorithms |
| Component: | Adjoint | Version: | 3.1 |
| Keywords: | Cc: |
Description
We need to have the capability of specifying the number of Hessian approximation eigenvectors to use during preconditioning. Currently, the conjugate gradient cgradient.h uses all the eigenpairs computed from the Lanczos algorithm.
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A new input parameter NritzEV was added to input script s4dvar.in to control the number of eigenvectors to use during preconditioning.