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author soto <soto@cr.ie.u-ryukyu.ac.jp>
date Tue, 02 Nov 2021 06:55:58 +0900
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children 339fb67b4375
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cong : @$\forall$@ (f : A @$\rightarrow$@ B) {x y} @$\rightarrow$@ x @$\equiv$@ y @$\rightarrow$@ f x @$\equiv$@ f y
cong f refl = refl