Question

Divisibility Relation On the Set $S = \{ 2, 6, 7, 14, 15, 30, 70, 105, 210 \}$: Hasse Diagram, Maximal, Minimal Elements, Greatest, Least elements

score 3.6k · Answer 1 · 2026-03-26 01:11:42

3.6k

Views

Divisibility Relation On the Set $S = \{ 2, 6, 7, 14, 15, 30, 70, 105, 210 \}$: Hasse Diagram, Maximal, Minimal Elements, Greatest, Least elements

Published on 26 Mar 2026 - 1:11

score 49 · Answer 2 · 2018-08-27 16:50:01

49

Views

Partially ordered? Transitive closure?

Published on 27 Aug 2018 - 16:50

score 56 · Answer 3 · 2026-03-19 20:07:45

56

Views

Looking for an example of a continuous function such that the inverse image is not a Heyting Algebras morphism

Published on 19 Mar 2026 - 20:07

score 260 · Answer 4 · 2026-03-25 06:00:36

260

Views

If $2^\mu$ and $2^\lambda$ are isomorphic as boolean algebras, is it true that $\mu = \lambda$?

Published on 25 Mar 2026 - 6:00

score 417 · Answer 5 · 2026-03-25 15:41:24

417

Views

Proving well ordering principle from PMI (PCI) from peano axioms

Published on 25 Mar 2026 - 15:41

score 253 · Answer 6 · 2026-03-25 06:06:18

253

Views

What is the Stone space of the free sigma-algebra on countably many generators

Published on 25 Mar 2026 - 6:06

score 56 · Answer 7 · 2026-03-25 15:58:37

56

Views

Equivalence between conditions for induction on well-ordered sets.

Published on 25 Mar 2026 - 15:58

score 54 · Answer 8 · 2026-03-25 15:11:06

54

Views

Transfinity of $\mathbb{Q}$ and $\mathbb{Z}$

Published on 25 Mar 2026 - 15:11

score 461 · Answer 9 · 2018-08-31 10:14:22

461

Views

Chains and Antichains: Proof

Published on 31 Aug 2018 - 10:14

score 102 · Answer 10 · 2026-03-22 09:40:14

102

Views

If $f$ is an epimorphism of frames, it is surjective as function?

Published on 22 Mar 2026 - 9:40

score 390 · Answer 11 · 2018-09-02 20:05:17

390

Views

Order relation and the same order type

Published on 02 Sep 2018 - 20:05

score 134 · Answer 12 · 2018-09-02 21:52:25

134

Views

Immediate succesors in $[0,1)\times \mathbb{Z}_+$ and $\mathbb{Z}_+\times [0,1)$

Published on 02 Sep 2018 - 21:52

score 206 · Answer 13 · 2018-09-02 21:55:21

206

Views

combinatorics: a variant of set covering/subset selection problem?

Published on 02 Sep 2018 - 21:55

score 141 · Answer 14 · 2026-03-25 19:06:19

141

Views

If $\omega^\alpha$ has cofinality $\omega^\beta$, and $\beta\le\gamma\le\alpha$, does it also have a cofinal subset of order type $\omega^\gamma$?

Published on 25 Mar 2026 - 19:06

score 199 · Answer 15 · 2026-03-25 14:26:08

199

Views

Given an ordinal with a particular cofinality, can we find other cofinal subsets with order type and cofinality at least that large?

Published on 25 Mar 2026 - 14:26

List Question

Divisibility Relation On the Set $S = \{ 2, 6, 7, 14, 15, 30, 70, 105, 210 \}$: Hasse Diagram, Maximal, Minimal Elements, Greatest, Least elements

Partially ordered? Transitive closure?

Looking for an example of a continuous function such that the inverse image is not a Heyting Algebras morphism

If $2^\mu$ and $2^\lambda$ are isomorphic as boolean algebras, is it true that $\mu = \lambda$?

Proving well ordering principle from PMI (PCI) from peano axioms

What is the Stone space of the free sigma-algebra on countably many generators

Equivalence between conditions for induction on well-ordered sets.

Transfinity of $\mathbb{Q}$ and $\mathbb{Z}$

Chains and Antichains: Proof

If $f$ is an epimorphism of frames, it is surjective as function?

Order relation and the same order type

Immediate succesors in $[0,1)\times \mathbb{Z}_+$ and $\mathbb{Z}_+\times [0,1)$

combinatorics: a variant of set covering/subset selection problem?

If $\omega^\alpha$ has cofinality $\omega^\beta$, and $\beta\le\gamma\le\alpha$, does it also have a cofinal subset of order type $\omega^\gamma$?

Given an ordinal with a particular cofinality, can we find other cofinal subsets with order type and cofinality at least that large?

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