diff fig/morphism_composition_law.xbb @ 23:61e5659e04a9

Add description for natural deduction
author Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
date Mon, 09 Feb 2015 22:13:18 +0900
parents 7d94faaeb448
children 8a70394e45b4
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