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Proof step 14 from proof head-corr (previous step)

buf .len = 1 + n→i(# x), a ' + x = tolist(buf, i→n(buf .len)), inv(buf) ⊦ 〈head#(buf; b)〉 a = b

User applied rule call right

And obtained the following new goals

Proof step 13:
buf .len = 1 + n→i(# x), a ' + x = tolist(buf, i→n(buf .len)), inv(buf) ⊦ 〈get#(buf .first, buf .data; a0)〉 a = a0

Rule argument

[fmapos-arg: pos: right 1]

Additional information

[[CONCRETESIMPRULES : ([CSIMPDECL : head# (buf; a) { get#(buf .first, buf .data; a) }])]]