- #1
sujoykroy
- 18
- 0
Can you prove the following theory of cardinality for a Cartesian product, -
[itex]\left|\:A\:\right|\:\leq\:\left|\:A\:\times\:B\:\right|\: if\: B\neq\phi[/itex]
In English,
The cardinality of a set [itex]A[/itex] is less than or equal to the cardinality of Cartesian product of A and a non empty set [itex]B[/itex].
[itex]\left|\:A\:\right|\:\leq\:\left|\:A\:\times\:B\:\right|\: if\: B\neq\phi[/itex]
In English,
The cardinality of a set [itex]A[/itex] is less than or equal to the cardinality of Cartesian product of A and a non empty set [itex]B[/itex].