Question

Characterize a $\sigma$-algebra generated by a family of sets $\sigma(C)=\mathcal{B}_{\Omega}$

score 607 · Answer 1 · 2026-03-25 06:21:38

607

Views

Characterize a $\sigma$-algebra generated by a family of sets $\sigma(C)=\mathcal{B}_{\Omega}$

Published on 25 Mar 2026 - 6:21

score 128 · Answer 2 · 2019-08-21 09:09:36

128

Views

What "good" (illuminating) examples are there of elements in $\omega^\omega\setminus\omega^{<\omega}$?

Published on 21 Aug 2019 - 9:09

score 146 · Answer 3 · 2019-08-29 01:32:04

146

Views

proof on Ordinal Multiplication

Published on 29 Aug 2019 - 1:32

score 148 · Answer 4 · 2019-08-29 06:54:06

148

Views

Linear ordering isomorphic to an initial segment

Published on 29 Aug 2019 - 6:54

score 76 · Answer 5 · 2019-09-01 06:23:46

76

Views

doubt in set theory

Published on 01 Sep 2019 - 6:23

score 92 · Answer 6 · 2019-09-02 09:29:15

92

Views

Another ordinals question $\sum_{i\in\omega +3} i\cdot\omega + \omega\cdot i$

Published on 02 Sep 2019 - 9:29

score 326 · Answer 7 · 2026-03-25 16:20:53

Show that for every uncountable $A \subseteq \omega_1$, the set $\{\alpha \in Lim(\omega_1): A_\alpha \subseteq A\}$ is stationary in $\omega_1$

score 98 · Answer 8 · 2019-09-19 00:41:39

98

Views

Question Involving Sequences of Successive Limit Ordinals

Published on 19 Sep 2019 - 0:41

score 163 · Answer 9 · 2026-03-25 01:31:14

163

Views

Question on An Explicit Enumeration of Ordinals

Published on 25 Mar 2026 - 1:31

score 162 · Answer 10 · 2019-09-23 12:30:10

162

Views

Recursively Enumerable Ordinals

Published on 23 Sep 2019 - 12:30

score 91 · Answer 11 · 2019-09-23 18:35:18

91

Views

Can this ordinal system with a counting function interpret ZFC?

Published on 23 Sep 2019 - 18:35

score 87 · Answer 12 · 2019-09-29 17:24:20

87

Views

Confusion about $\omega^{CK}_{\omega_1+1}$

Published on 29 Sep 2019 - 17:24

score 69 · Answer 13 · 2019-09-30 11:43:38

69

Views

On what set is the group action of the sequence truncation function, the identity function?

Published on 30 Sep 2019 - 11:43

score 271 · Answer 14 · 2014-03-13 12:36:56

271

Views

Prove that for every three ordinals $\beta \lt \gamma \Rightarrow \alpha+\beta \lt \alpha+\gamma$

Published on 13 Mar 2014 - 12:36

score 417 · Answer 15 · 2014-03-13 17:39:34

417

Views

Cardinality of Orderings of $\mathbb{R}$

Published on 13 Mar 2014 - 17:39

List Question

Characterize a $\sigma$-algebra generated by a family of sets $\sigma(C)=\mathcal{B}_{\Omega}$

What "good" (illuminating) examples are there of elements in $\omega^\omega\setminus\omega^{<\omega}$?

proof on Ordinal Multiplication

Linear ordering isomorphic to an initial segment

doubt in set theory

Another ordinals question $\sum_{i\in\omega +3} i\cdot\omega + \omega\cdot i$

Show that for every uncountable $A \subseteq \omega_1$, the set $\{\alpha \in Lim(\omega_1): A_\alpha \subseteq A\}$ is stationary in $\omega_1$

Question Involving Sequences of Successive Limit Ordinals

Question on An Explicit Enumeration of Ordinals

Recursively Enumerable Ordinals

Can this ordinal system with a counting function interpret ZFC?

Confusion about $\omega^{CK}_{\omega_1+1}$

On what set is the group action of the sequence truncation function, the identity function?

Prove that for every three ordinals $\beta \lt \gamma \Rightarrow \alpha+\beta \lt \alpha+\gamma$

Cardinality of Orderings of $\mathbb{R}$

Trending Questions

Popular # Hahtags

Popular Questions