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Proof step 4 from proof test-01 (previous step)

⊦ 3861 = hex("F15")

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ str ≠ "" → hex(str) = hexchar(str.char1) * 16 ^ (n→i(# str) - 1) + hex(str.rstring)
Proof step 6:
"F15" ≠ "" ⊦ 3861 = hexchar("F15".char1) * 16 ^ (n→i(# "F15") - 1) + hex("F15".rstring)

Rule argument

name: hex-rec rotate: F subst: [str] → ["F15"]

Additional information

Used terms: "F15"