5 lines
240 B
Text
5 lines
240 B
Text
def g {n m : nat} (v : array nat (n + m)) : array nat (m + n) :=
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eq.rec_on (add_comm n m) v -- Worked before
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def f {n m : nat} (v : array nat (n + m)) : array nat (m + n) :=
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eq.cases_on (add_comm n m) v -- eq.cases_on was not being erased
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