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Proof step 11 from proof val-total-01 (previous step)

pos(char, sortedchars) = pos(char2, sortedchars) ⊦ char = char2, pos(char, sortedchars) < # sortedchars

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: <toplevel> name: insorted seq: ⊦ pos(char, sortedchars) < # sortedchars ↔ true subst: [char] → [char] flags: <all paths>

Additional information

Used terms: char