Question

(Partial) symmetry order for matrices

score 134 · Answer 1 · 2014-10-31 14:48:49

134

Views

(Partial) symmetry order for matrices

Published on 31 Oct 2014 - 14:48

score 775 · Answer 2 · 2014-10-31 18:07:54

775

Views

Prove that if X is well-ordered, there is no strictly decreasing sequence of elements in X.

Published on 31 Oct 2014 - 18:07

score 1k · Answer 3 · 2014-11-02 00:17:40

1k

Views

Composition of permutations is an equivalence relation

Published on 02 Nov 2014 - 0:17

score 2.3k · Answer 4 · 2014-11-02 11:31:48

2.3k

Views

Number of linear extensions

Published on 02 Nov 2014 - 11:31

score 631 · Answer 5 · 2026-03-25 17:28:28

631

Views

Notation for rank of weakly ordered elements

Published on 25 Mar 2026 - 17:28

score 180 · Answer 6 · 2026-03-28 15:18:43

180

Views

A question about cofinal totally ordered sets.

Published on 28 Mar 2026 - 15:18

score 123 · Answer 7 · 2014-11-04 10:36:08

123

Views

Does there exist an amazing poset that is neither totally-ordered nor well-founded?

Published on 04 Nov 2014 - 10:36

score 662 · Answer 8 · 2014-11-04 23:46:19

662

Views

When multiplying by $i$ in inequalities, does the sign flip?

Published on 04 Nov 2014 - 23:46

score 1k · Answer 9 · 2014-11-07 11:53:06

1k

Views

Initial segments of well-ordered sets are isomorphic

Published on 07 Nov 2014 - 11:53

score 71 · Answer 10 · 2014-11-08 10:11:06

Categorial description of the subposet of $\prod_{i \in I}P_i$ of all $x \in \prod_{i \in I}P_i$ with $\{i \in I \mid x_i = \bot_{P_i}\}$ cofinite

score 84 · Answer 11 · 2014-11-08 11:37:53

84

Views

Is there a nice characterization of those posets in which $\vartriangle_P$ is transitive?

Published on 08 Nov 2014 - 11:37

score 127 · Answer 12 · 2026-03-29 20:54:55

127

Views

Positive elements of a $C^*$-algbera form a poset

Published on 29 Mar 2026 - 20:54

score 90 · Answer 13 · 2014-11-09 12:05:23

90

Views

Prove that, for all ordered sets P, Q and R,

Published on 09 Nov 2014 - 12:05

score 543 · Answer 14 · 2014-11-10 19:55:21

543

Views

Why is every monomial order a well-ordering?

Published on 10 Nov 2014 - 19:55

score 550 · Answer 15 · 2014-11-10 20:06:25

550

Views

does isomorphic Hasse diagrams represent two different posets or same poset?

Published on 10 Nov 2014 - 20:06

List Question

(Partial) symmetry order for matrices

Prove that if X is well-ordered, there is no strictly decreasing sequence of elements in X.

Composition of permutations is an equivalence relation

Number of linear extensions

Notation for rank of weakly ordered elements

A question about cofinal totally ordered sets.

Does there exist an amazing poset that is neither totally-ordered nor well-founded?

When multiplying by $i$ in inequalities, does the sign flip?

Initial segments of well-ordered sets are isomorphic

Categorial description of the subposet of $\prod_{i \in I}P_i$ of all $x \in \prod_{i \in I}P_i$ with $\{i \in I \mid x_i = \bot_{P_i}\}$ cofinite

Is there a nice characterization of those posets in which $\vartriangle_P$ is transitive?

Positive elements of a $C^*$-algbera form a poset

Prove that, for all ordered sets P, Q and R,

Why is every monomial order a well-ordering?

does isomorphic Hasse diagrams represent two different posets or same poset?

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