Talk:Exceptional isomorphism

Possible relevant paper
Is Andreas Blass's "Seven Trees in One" a relevant example of an isomorphism? There is an isomorphism between the set of figures binary trees and the seven-fold Cartesian product of that set that is particularly simple to write down via casework, while the same cannot be said for two-, three-, four-, five-, or six-fold Cartesian product. C7XWiki (talk) 09:39, 5 January 2023 (UTC)