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Proof step 2 from proof validfieldlist-one-01 (conclusion)

⊦ validfieldlist(str, r, sk ', st) ↔ validfield(str, r, sk, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ validfieldlist(str, r, sks, st) ↔ (∀ sk. sk ∈ sks → validfield(str, r, sk, st))

Rule argument

[crewrite-arg: validfieldlist-def-01 , F , [st, sks, r, str] → [st, sk ', r, str] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ sk ∈ sk0 ' ↔ sk = sk0])], [EXTRATERMS : (st, sk ', r, str)]]