NOX: allow for external fixed Jacobian in SingleStep solver #2394

James Willenbringrequested to merge
rppawlo:issue_2394 into develop

Created by: rppawlo

We have a use case where an application externally computes the Jacobian and would like to reuse it in the SingelStep solver. We need the capability to set the Jacobian on the group and tell the group that it is already up to date wrt the solution vector. Then need the SingleStep solver to be aware of this "fixed Jacobian" that it should not update.

@trilinos/nox

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