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fix
author soto@cr.ie.u-ryukyu.ac.jp
date Tue, 15 Sep 2020 07:06:29 +0900
parents 73127e0ab57c
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 = ?