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FIX
author soto <soto@cr.ie.u-ryukyu.ac.jp>
date Fri, 27 May 2022 12:31:39 +0900
parents 14a0e409d574
children
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rewrite-+-comm : (x y : !$\mathbb{N}$!) !$\rightarrow$! x + y !$\equiv$! y + x
rewrite-+-comm zero y rewrite (+zero {y}) = refl
rewrite-+-comm (suc x) y = ?