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Proof step 29 from proof validstatfields-initundone (previous step)

⊦ validstatfields(str, statfields(class), st) ↔ statfields(class) = [] ∨ tdname∃(str, class), initdone(class, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ validstatfields(str, sks, st) ↔ (∀ sk. sk ∈ sks → validstatfield(str, sk, st))
Proof step 28:
⊦ (∀ sk. sk ∈ statfields(class) → validstatfield(str, sk, st)) ↔ statfields(class) = [] ∨ tdname∃(str, class), initdone(class, st)

Rule argument

[crewrite-arg: validstatfields-storekeys-def , F , [st, sks, str] → [st, statfields(class), str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, statfields(class), str)]]