Show that for each infinite cardinal , .
Notation: denotes the cofinality. I know some properties of . They may be helpful.
For each infinite cardinal number , .
However, I do not see how to prove this. Any hints would be great. Thanks.
Show that for each infinite cardinal , .
Notation: denotes the cofinality. I know some properties of . They may be helpful.
For each infinite cardinal number , .
However, I do not see how to prove this. Any hints would be great. Thanks.