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when toggle format what by license comment
Aug 29, 2019 at 13:15 comment added RobPratt Yes, for the Cartesian product the bijection is the identity, not an arbitrary bijection.
Aug 29, 2019 at 12:07 comment added Vince Vatter That's not true if the vertices are simply connected "bijectively", as the question specifies.
Aug 29, 2019 at 11:41 history answered RobPratt CC BY-SA 4.0