Mercurial > hg > Papers > 2020 > soto-midterm
annotate src/agda-term1.agda.replaced @ 1:73127e0ab57c
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author | soto@cr.ie.u-ryukyu.ac.jp |
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date | Tue, 08 Sep 2020 18:38:08 +0900 |
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rev | line source |
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1 | 1 +-comm : (x y : @$\mathbb{N}$@) @$\rightarrow$@ x + y @$\equiv$@ y + x |
2 +-comm zero y rewrite (+zero {y}) = refl | |
3 +-comm (suc x) y = let open @$\equiv$@-Reasoning in | |
4 begin | |
5 ?0 @$\equiv$@@$\langle$@ ?1 @$\rangle$@ | |
6 ?2 @$\blacksquare$@ | |
7 | |
8 -- ?0 : @$\mathbb{N}$@ {(suc x) + y} | |
9 -- ?1 : suc x + y @$\equiv$@ y + suc x | |
10 -- ?2 : @$\mathbb{N}$@ |