List questions from order-theory

Published on 31 Jul 2016 - 21:11

83

Views

What is the precise relationship between $\omega+1$ and any convergent sequence?

Published on 31 Mar 2026 - 14:25

555

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How to show that $\omega_1$ is not secound countable?

Published on 25 Mar 2026 - 13:54

31

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A well ordered set haven't the same order that any section

Published on 03 Aug 2016 - 2:48

33

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Poset definition: Reduction to a point.

Published on 05 Aug 2016 - 17:47

962

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Prove equivalence of Axiom of choice and Zorn's lemma

Published on 25 Mar 2026 - 9:29

46

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Prove that $\leq_p\subseteq\mathbb N^\infty\times\mathbb N^\infty$ is transitive

Published on 14 Aug 2016 - 9:10

110

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Are there non-abelian groups with an order preserving operation?

Published on 15 Aug 2016 - 4:00

803

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Total orderings on $\mathbb{Q}(\sqrt2)$

Published on 15 Aug 2016 - 23:28

42

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Isotone families of filters, are they filters themselves?

Published on 17 Aug 2016 - 16:03

223

Views

From algebraic lattice to a poset lattice

Published on 29 Mar 2026 - 14:57

105

Views

Is the order inevitable in constructing the real numbers?

Published on 29 Mar 2026 - 7:30

27

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What to call elements next to each other in a finite subset of an infinite set?

Published on 23 Aug 2016 - 9:07

114

Views

Why $\mathcal A$ is not bounded below?

Published on 24 Aug 2016 - 3:03

252

Views

Synonym for idempotent

Published on 29 Mar 2026 - 14:55

List Question

Why order topology is defined with open intervals, not closed ones?

What is the precise relationship between $\omega+1$ and any convergent sequence?

How to show that $\omega_1$ is not secound countable?

A well ordered set haven't the same order that any section

Poset definition: Reduction to a point.

Prove equivalence of Axiom of choice and Zorn's lemma

Prove that $\leq_p\subseteq\mathbb N^\infty\times\mathbb N^\infty$ is transitive

Are there non-abelian groups with an order preserving operation?

Total orderings on $\mathbb{Q}(\sqrt2)$

Isotone families of filters, are they filters themselves?

From algebraic lattice to a poset lattice

Is the order inevitable in constructing the real numbers?

What to call elements next to each other in a finite subset of an infinite set?

Why $\mathcal A$ is not bounded below?

Synonym for idempotent

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