Hello!
How to find well ordered sets $\displaystyle (X,<_1), (Y,<_2)$ such that $\displaystyle X\times Y$ with lexicographic order isn't isomorphic to $\displaystyle Y\times X $ with lexicographic order?
Thank you!
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Hello!
How to find well ordered sets $\displaystyle (X,<_1), (Y,<_2)$ such that $\displaystyle X\times Y$ with lexicographic order isn't isomorphic to $\displaystyle Y\times X $ with lexicographic order?
Thank you!
See why ordinal multiplication is not commutative.
Quote:
Originally Posted by emakarov
Makarov, thank you very much for this information.
