Question

What are the factors of $\aleph_0$?

score 127 · Answer 1 · 2026-04-04 16:55:20

127

Views

What are the factors of $\aleph_0$?

Published on 04 Apr 2026 - 16:55

score 2.6k · Answer 2 · 2013-04-29 18:53:57

2.6k

Views

Bijection between power sets of sets implies bijection between sets?

Published on 29 Apr 2013 - 18:53

score 1k · Answer 3 · 2013-04-30 08:29:07

1k

Views

Tightness and countable intersection of neighborhoods

Published on 30 Apr 2013 - 8:29

score 230 · Answer 4 · 2013-04-30 15:56:58

230

Views

Order type of the set of all cardinals strictly below any given cardinal

Published on 30 Apr 2013 - 15:56

score 276 · Answer 5 · 2013-05-01 02:42:53

276

Views

How badly can GCH fail?

Published on 01 May 2013 - 2:42

score 106 · Answer 6 · 2013-05-01 12:10:08

106

Views

If $X$ is Hausdorff and $|X|> \mathfrak{c}$, does $X$ always have a uncountable discrete subspace?

Published on 01 May 2013 - 12:10

score 226 · Answer 7 · 2013-05-01 17:02:59

226

Views

Cardinality of the class of $G_\delta$ subset of $\mathbb{R}$ of Lebesgue measure zero

Published on 01 May 2013 - 17:02

score 103 · Answer 8 · 2026-04-02 18:37:59

103

Views

If $cf(\kappa)=\lambda$, then is every sequence of length $\lambda$ cofinal in $\kappa$?

Published on 02 Apr 2026 - 18:37

score 122 · Answer 9 · 2013-05-03 06:30:11

122

Views

A conjecture on closed discrete subset

Published on 03 May 2013 - 6:30

score 1.1k · Answer 10 · 2026-04-02 18:47:49

1.1k

Views

Confusion about cofinality

Published on 02 Apr 2026 - 18:47

score 113 · Answer 11 · 2013-05-05 01:21:41

113

Views

Cardinalties of Reals and Naturals

Published on 05 May 2013 - 1:21

score 173 · Answer 12 · 2026-04-02 01:22:44

173

Views

What questions become answerable/computable given an uncountable character set?

Published on 02 Apr 2026 - 1:22

score 80 · Answer 13 · 2013-05-06 16:11:32

80

Views

Can the number of numbers in two intervals over $\mathbb{R^+}$ be compared?

Published on 06 May 2013 - 16:11

score 518 · Answer 14 · 2026-03-28 04:35:18

518

Views

How big is the size of all infinities?

Published on 28 Mar 2026 - 4:35

score 421 · Answer 15 · 2026-03-28 04:35:12

421

Views

Can we embed the ordinal and cardinal number systems into larger, more convenient systems of arithmetic?

Published on 28 Mar 2026 - 4:35

List Question

What are the factors of $\aleph_0$?

Bijection between power sets of sets implies bijection between sets?

Tightness and countable intersection of neighborhoods

Order type of the set of all cardinals strictly below any given cardinal

How badly can GCH fail?

If $X$ is Hausdorff and $|X|> \mathfrak{c}$, does $X$ always have a uncountable discrete subspace?

Cardinality of the class of $G_\delta$ subset of $\mathbb{R}$ of Lebesgue measure zero

If $cf(\kappa)=\lambda$, then is every sequence of length $\lambda$ cofinal in $\kappa$?

A conjecture on closed discrete subset

Confusion about cofinality

Cardinalties of Reals and Naturals

What questions become answerable/computable given an uncountable character set?

Can the number of numbers in two intervals over $\mathbb{R^+}$ be compared?

How big is the size of all infinities?

Can we embed the ordinal and cardinal number systems into larger, more convenient systems of arithmetic?

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