Ordering: Difference between revisions
No edit summary |
|||
| Line 1: | Line 1: | ||
Related to counting, countabiliy | Related to counting, countabiliy. | ||
==Diagonal== | ==Diagonal== | ||
| Line 50: | Line 51: | ||
The formula is figure 1 is as follows: | The formula is figure 1 is as follows: | ||
Used in the proof of: | |||
* The Cartesian product of two countable sets is countable | |||