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Oct
22
revised How do I show that $\kappa^+ \le 2^\kappa$ for every cardinal $\kappa$?
added 45 characters in body
Oct
21
revised How do I show that $\kappa^+ \le 2^\kappa$ for every cardinal $\kappa$?
edited body; edited title
Dec
5
revised Why is $\omega$ the smallest $\infty$?
deleted 76 characters in body
Dec
5
revised Why is $\omega$ the smallest $\infty$?
deleted 350 characters in body
Dec
5
revised Why is $\omega$ the smallest $\infty$?
added 917 characters in body
Dec
1
revised Is there a number that's right in the middle of this interval $(0, 1)$?
added 385 characters in body
Aug
24
revised If $\kappa$ is a cardinal, $\aleph$ is any $\aleph$-number, and if $\kappa\leq\aleph$ then $\kappa$ can be well ordered as well.
edited body
Aug
11
revised How can one prove that the union of two finite sets is again finite, without the use of arithmetic?
deleted 1 characters in body