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Proof step 25 from proof ac-in-08 (previous step)

∀ r, st, class1. r ∈ st → r ∈ addclass(class1, fis0, st) ⊦ r ∈ st → r ∈ addclass(class1, fv + fis0, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 24:
r ∈ st, ∀ r, st, class1. r ∈ st → r ∈ addclass(class1, fis0, st) ⊦ r ∈ addclass(class1, fv ' + fis0, st)

Rule argument

[emptyarg]

Additional information

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