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INIT rbt.agda
author soto <soto@cr.ie.u-ryukyu.ac.jp>
date Sun, 07 Nov 2021 00:51:16 +0900
parents c59202657321
children
line wrap: on
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_-_ :!$\mathbb{N}$! !$\rightarrow$!!$\mathbb{N}$! !$\rightarrow$!!$\mathbb{N}$!
x - zero  = x
zero - _  = zero
(suc x) - (suc y)  = x - y