They know some reference where it is shown the pushout associative property?
$$(B\underset{A}{\sqcup}C)\underset{D}{\sqcup}E \simeq B\underset{A}{\sqcup}(C\underset{D}{\sqcup}E)$$
2026-03-29 13:40:24.1774791624
Associativity of pushouts
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