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!
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.