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view paper/src/zero.agda.replaced @ 11:831316a767e8

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add hoare figure
author ryokka
date Mon, 10 Feb 2020 14:20:21 +0900
parents b5fffa8ae875
children e8655e0264b8
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+zero : { y : @$\mathbb{N}$@ } @$\rightarrow$@ y + zero  @$\equiv$@ y
+zero {zero} = refl
+zero {suc y} = cong ( @$\lambda$@ x @$\rightarrow$@ suc x ) ( +zero {y} )