John Natawabe

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79 reputation
3
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visits member for 2 years
seen Sep 18 '12 at 6:13

Sep
18
asked Confusion regarding Russell's paradox
Sep
17
accepted How to prove that Cantor's normal form can produce all ordinal numbers
Sep
17
accepted How to prove that $\epsilon_0$ exists?
Sep
17
accepted How to define countability of $\omega^{\omega}$ and $\omega_1$? in set theory?
Sep
17
awarded  Scholar
Sep
17
accepted How does one prove that there are uncountable number of countable ordinals?
Sep
17
comment How does one prove that there are uncountable number of countable ordinals?
Well, I know why sup exists... but I guess that might be useful to include. Not sure. And obviously why countable set of countable numbers are countable - I know that. :)
Sep
17
asked How does one prove that there are uncountable number of countable ordinals?
Sep
17
asked How to prove that Cantor's normal form can produce all ordinal numbers
Sep
17
awarded  Student
Sep
17
asked How to prove that $\epsilon_0$ exists?
Sep
17
awarded  Editor
Sep
17
comment How to define countability of $\omega^{\omega}$ and $\omega_1$? in set theory?
@MJD I changed the question a bit. Would you answer this question also? thanks.
Sep
17
revised How to define countability of $\omega^{\omega}$ and $\omega_1$? in set theory?
added 143 characters in body; edited tags; edited title
Sep
17
asked How to define countability of $\omega^{\omega}$ and $\omega_1$? in set theory?