Question

Limit Ordinal but Finite Cardinal

score 139 · Answer 1 · 2026-04-03 18:22:46

139

Views

Limit Ordinal but Finite Cardinal

Published on 03 Apr 2026 - 18:22

score 139 · Answer 2 · 2017-06-09 14:08:56

139

Views

What is the cardinality of the set of all ultrafilters containing a Fréchet filter?

Published on 09 Jun 2017 - 14:08

score 407 · Answer 3 · 2017-06-10 00:30:25

407

Views

What cardinalities can a complete metric space of a given density character have?

Published on 10 Jun 2017 - 0:30

score 494 · Answer 4 · 2026-02-23 04:37:12

494

Views

Isomorphism between $\mathbb{T}$ and $\mathbb{R} \oplus \mathbb{Q}/\mathbb{Z}$.

Published on 23 Feb 2026 - 4:37

score 343 · Answer 5 · 2017-06-12 20:09:46

343

Views

Cantor Snake Diagonalization Argument for Disproving Countability

Published on 12 Jun 2017 - 20:09

score 102 · Answer 6 · 2017-06-15 01:30:09

102

Views

Find the largest cardinality

Published on 15 Jun 2017 - 1:30

score 151 · Answer 7 · 2017-06-15 05:43:14

151

Views

Prove that $|\mathbb{Q}| = |\mathbb{Q} \times \mathbb{Q}|$

Published on 15 Jun 2017 - 5:43

score 110 · Answer 8 · 2017-06-15 13:46:47

110

Views

How slow should a set grow in order to be countable?

Published on 15 Jun 2017 - 13:46

score 371 · Answer 9 · 2026-03-26 16:06:58

371

Views

If and only if there is a bijection from a set onto itself, then the set is of distinct terms?

Published on 26 Mar 2026 - 16:06

score 355 · Answer 10 · 2017-06-18 02:21:46

355

Views

A set S is infinite if and only if for all n∈ℕ, there exists a subset of S whose cardinality is n.

Published on 18 Jun 2017 - 2:21

score 155 · Answer 11 · 2017-06-18 11:58:03

155

Views

intuitive description of $\beth_2$ cardinality

Published on 18 Jun 2017 - 11:58

score 296 · Answer 12 · 2026-04-03 20:03:05

296

Views

Computing a cardinal and an ordinal

Published on 03 Apr 2026 - 20:03

score 91 · Answer 13 · 2017-06-19 19:52:23

91

Views

What is the sup of the cardinalities of the chains in $\mathcal P(X)$?

Published on 19 Jun 2017 - 19:52

score 177 · Answer 14 · 2017-06-19 21:36:25

177

Views

Let $A$ be a well ordered set, show $h(A) = h^*(A)$

Published on 19 Jun 2017 - 21:36

score 1.1k · Answer 15 · 2017-06-19 21:42:28

1.1k

Views

Show that the set of odd integers has the same cardinality as $\{2^n\mid n\in\mathbb N\}$

Published on 19 Jun 2017 - 21:42

List Question

Limit Ordinal but Finite Cardinal

What is the cardinality of the set of all ultrafilters containing a Fréchet filter?

What cardinalities can a complete metric space of a given density character have?

Isomorphism between $\mathbb{T}$ and $\mathbb{R} \oplus \mathbb{Q}/\mathbb{Z}$.

Cantor Snake Diagonalization Argument for Disproving Countability

Find the largest cardinality

Prove that $|\mathbb{Q}| = |\mathbb{Q} \times \mathbb{Q}|$

How slow should a set grow in order to be countable?

If and only if there is a bijection from a set onto itself, then the set is of distinct terms?

A set S is infinite if and only if for all n∈ℕ, there exists a subset of S whose cardinality is n.

intuitive description of $\beth_2$ cardinality

Computing a cardinal and an ordinal

What is the sup of the cardinalities of the chains in $\mathcal P(X)$?

Let $A$ be a well ordered set, show $h(A) = h^*(A)$

Show that the set of odd integers has the same cardinality as $\{2^n\mid n\in\mathbb N\}$

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