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Proof step 4 from proof hex-rec (previous step)

⊦ char ' + str0 = "", hex(char ' + str0) = hex(str0) + 16 ^ n→i(# str0) * hexchar(char)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ hex(str) = hexint(hexstring(str))
Proof step 6:
⊦ char ' + str0 = "", hexint(hexstring(char ' + str0)) = hex(str0) + 16 ^ n→i(# str0) * hexchar(char)

Rule argument

spec: inst: name: hex-def seq: ⊦ hex(str) = hexint(hexstring(str)) subst: [str] → [char ' + str0] flags: rewrite, current

Additional information

Used terms: char ' + str0