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Proof step 25 from proof ac-refin (previous step)

∀ rk, st, class. rk ∈ st → rk ∈ addclass(class, fis0, st), rk ∈ st ⊦ rk ∈ addclass(class, fv + fis0, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 24:
rk ∈ st, ∀ rk, st, class. rk ∈ st → rk ∈ addclass(class, fis0, st) ⊦ rk ∈ addclass(class, fv ' + fis0, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ fv + fis = fv ' + fis])]]