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Proof step 29 from proof addclass-switch (previous step)

is_indexkey(sk), ∀ class, st, r, i, val. addclass(class, fis0, st[r -- i ', val]) = (addclass(class, fis0, st)[r -- i ', val]) ⊦ addclass(class, fis0, st[r -- i ', val]) = (addclass(class, fis0, st)[r -- i ', val])

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

[EXRARG : pos: left 2, [QUANTTERMLIST : (class, st, r, i, val)]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (class, st, r, i, val)]]