Tests for the all-at-once preconditioners

firedrakeproject / asQ

A library for implementing ParaDIAG timestepping algorithms using Firedrake

MIT License

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Closed JHopeCollins closed 5 months ago

JHopeCollins commented 9 months ago

JacobiPC: check that you get a decent residual drop after Nt iterations.
CirculantPC: check that you get close to the alpha/(1-alpha) convergence rate for linear systems.
SliceJacobiPC: check that it always gets the same results with JacobiPC and check it gets the same results as CirculantPC if the slice is the entire timeseries.