If you use Argument directly, read on. If you just use TestFunction(V) and TrialFunction(V) no change is visible at the user level.
I'm changing the Argument class in UFL, such that a form argument number must always be provided. This argument is named 'number' and replaces the old 'count', to clarify that this is not the same; the new 'number' is an absolute index into the argument list of the form. If you want to create e.g. a trinary form, this is the new syntax: v0 = TestFunction(V) v1 = TrialFunction(V) v2 = Argument(V, 2) I've also added a 'part' to Argument, which will later be used to support block forms. For now it's just added as a dormant property and no algorithms support it. Martin
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