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Proof step 10 from proof validfieldlist-rec (previous step)

⊦ (∀ sk0. sk0 = sk ∨ sk0 ∈ sks → validfield(str, r, sk0, st)) ↔ validfield(str, r, sk, st) ∧ validfieldlist(str, r, sks, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ validfieldlist(str, r, sks, st) ↔ (∀ sk. sk ∈ sks → validfield(str, r, sk, st))
Proof step 9:
⊦ (∀ sk0. sk0 = sk ∨ sk0 ∈ sks → validfield(str, r, sk0, st)) ↔ validfield(str, r, sk, st) ∧ (∀ sk. sk ∈ sks → validfield(str, r, sk, st))

Rule argument

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

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, sks, r, str)]]