Question

Proving that $\omega_1$ is a limit ordinal

score 397 · Answer 1 · 2026-03-25 12:37:23

397

Views

Proving that $\omega_1$ is a limit ordinal

Published on 25 Mar 2026 - 12:37

score 2k · Answer 2 · 2018-06-09 18:12:38

2k

Views

Are there uncountable antichains in $\mathcal{P}(\mathbb{N})$

Published on 09 Jun 2018 - 18:12

score 5.9k · Answer 3 · 2018-06-11 07:05:41

5.9k

Views

Proof that the number of proofs is countably infinite

Published on 11 Jun 2018 - 7:05

score 125 · Answer 4 · 2018-06-13 05:36:57

125

Views

Bijective function from $\Bbb R$ to $\Bbb R^2$

Published on 13 Jun 2018 - 5:36

score 53 · Answer 5 · 2018-06-13 16:04:00

53

Views

What is the cardinality of the set of all subsets of $P(\mathbb N)$?

Published on 13 Jun 2018 - 16:04

score 44 · Answer 6 · 2018-06-14 06:18:21

What is the cardinality of $A=\{(x,y)\in \mathbb R\times \mathbb R|(x-y=\sqrt 2) \land (x+y\in \mathbb N)\}$?

score 101 · Answer 7 · 2018-06-18 05:47:32

101

Views

Help Find an Injective Function $f : P(\omega) \times P(\omega) \rightarrow P(\omega)$

Published on 18 Jun 2018 - 5:47

score 764 · Answer 8 · 2026-03-25 12:33:49

764

Views

About the proof that an infinite ordinal has the same cardinality as its successor

Published on 25 Mar 2026 - 12:33

score 220 · Answer 9 · 2018-06-22 11:29:46

220

Views

Prove Cardinality of Sets Exponentiation

Published on 22 Jun 2018 - 11:29

score 2.3k · Answer 10 · 2018-06-23 20:50:31

2.3k

Views

Cardinality of Cartesian product of infinite sets

Published on 23 Jun 2018 - 20:50

score 340 · Answer 11 · 2018-06-24 14:51:17

340

Views

Can Nedoma's pathology and other pathologies of larger measure spaces be avoided by changing the definition of sigma algebra?

Published on 24 Jun 2018 - 14:51

score 314 · Answer 12 · 2026-03-25 06:03:24

314

Views

Proof: $\kappa \cdot \kappa = \kappa$ for infinite cardinals

Published on 25 Mar 2026 - 6:03

score 189 · Answer 13 · 2018-07-01 05:58:37

189

Views

What is the cardinality of $P(\mathbb N)\times \mathbb R$?

Published on 01 Jul 2018 - 5:58

score 572 · Answer 14 · 2018-07-04 03:54:32

572

Views

Every uncountable subset $A$ of $\mathbb{R^n}$ has cardinality of the continuum?

Published on 04 Jul 2018 - 3:54

score 70 · Answer 15 · 2018-07-05 16:57:00

70

Views

True or False ( Countability)

Published on 05 Jul 2018 - 16:57

List Question

Proving that $\omega_1$ is a limit ordinal

Are there uncountable antichains in $\mathcal{P}(\mathbb{N})$

Proof that the number of proofs is countably infinite

Bijective function from $\Bbb R$ to $\Bbb R^2$

What is the cardinality of the set of all subsets of $P(\mathbb N)$?

What is the cardinality of $A=\{(x,y)\in \mathbb R\times \mathbb R|(x-y=\sqrt 2) \land (x+y\in \mathbb N)\}$?

Help Find an Injective Function $f : P(\omega) \times P(\omega) \rightarrow P(\omega)$

About the proof that an infinite ordinal has the same cardinality as its successor

Prove Cardinality of Sets Exponentiation

Cardinality of Cartesian product of infinite sets

Can Nedoma's pathology and other pathologies of larger measure spaces be avoided by changing the definition of sigma algebra?

Proof: $\kappa \cdot \kappa = \kappa$ for infinite cardinals

What is the cardinality of $P(\mathbb N)\times \mathbb R$?

Every uncountable subset $A$ of $\mathbb{R^n}$ has cardinality of the continuum?

True or False ( Countability)

Trending Questions

Popular # Hahtags

Popular Questions