List questions from order-theory

Published on 25 Mar 2026 - 23:09

134

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What's wrong with this proof that ordering on rationals isn't well-defined?

Published on 25 Mar 2026 - 23:08

726

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Optimizing over matrices in the Loewner ordering

Published on 27 Mar 2026 - 6:06

53

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Partial ordered sets and minimal

Published on 08 Jan 2017 - 15:22

211

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Proving transitivity of the negation of a partial order relation

Published on 08 Jan 2017 - 15:33

206

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Is a regular open set a scattered open set?

Published on 09 Jan 2017 - 8:51

125

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How to find all minima, maxima, largest and smallest elements of in a partially ordered set $S=\mathbb{N}$?

Published on 09 Jan 2017 - 14:28

56

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How to find maxima, minima, largest and smallest elements of $S=\mathbb{R}^2$?

Published on 09 Jan 2017 - 17:02

49

Views

Ordered semirings s.t. $A > AB$ iff $A \neq 0$ and $B = 0$

Published on 25 Mar 2026 - 11:13

231

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In a finite lattice, every filter is principal.

Published on 29 Mar 2026 - 21:36

116

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If $m=\omega(N log N)$, then what is the order of $N$ in terms of $m$?

Published on 11 Jan 2017 - 3:46

92

Views

Cardinality set of downsets

Published on 01 Apr 2026 - 5:01

356

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Is there a constructive well-ordering on the set of finite rooted trees?

Published on 26 Mar 2026 - 12:36

104

Views

No lattice point dominates another

Published on 14 Jan 2017 - 16:22

198

Views

When an infinite lattices is algebraic?

Published on 29 Mar 2026 - 21:35

List Question

Proving transitivity of ${\le}$ on $\mathbb{Q}$

What's wrong with this proof that ordering on rationals isn't well-defined?

Optimizing over matrices in the Loewner ordering

Partial ordered sets and minimal

Proving transitivity of the negation of a partial order relation

Is a regular open set a scattered open set?

How to find all minima, maxima, largest and smallest elements of in a partially ordered set $S=\mathbb{N}$?

How to find maxima, minima, largest and smallest elements of $S=\mathbb{R}^2$?

Ordered semirings s.t. $A > AB$ iff $A \neq 0$ and $B = 0$

In a finite lattice, every filter is principal.

If $m=\omega(N log N)$, then what is the order of $N$ in terms of $m$?

Cardinality set of downsets

Is there a constructive well-ordering on the set of finite rooted trees?

No lattice point dominates another

When an infinite lattices is algebraic?

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