Question

Order relations and counting the number of cases (Fubini numbers)

score 224 · Answer 1 · 2015-04-29 12:01:08

224

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Order relations and counting the number of cases (Fubini numbers)

Published on 29 Apr 2015 - 12:01

score 68 · Answer 2 · 2026-04-03 21:24:43

68

Views

Why is this an equivalence relation, and what does the equivalence classes contain?

Published on 03 Apr 2026 - 21:24

score 27.9k · Answer 3 · 2015-04-30 12:07:37

27.9k

Views

Calculate transitive closure of a relation

Published on 30 Apr 2015 - 12:07

score 1.5k · Answer 4 · 2015-05-02 02:01:17

1.5k

Views

Hasse Diagram Correct?

Published on 02 May 2015 - 2:01

score 509 · Answer 5 · 2026-04-03 21:21:40

509

Views

why are equivalence relations called so?

Published on 03 Apr 2026 - 21:21

score 38 · Answer 6 · 2026-04-03 21:30:41

38

Views

Intersection of two sets which are equivalence on set A is always equivalence?

Published on 03 Apr 2026 - 21:30

score 42 · Answer 7 · 2015-05-02 17:40:52

42

Views

Question Concerning a General Method to Show that a Relation is Not a Function

Published on 02 May 2015 - 17:40

score 58 · Answer 8 · 2015-05-02 20:15:07

58

Views

Is $f:\mathbb{Q^*} \rightarrow \mathbb{Q}$ by $f(\frac{a}{b}) = \frac{\max{(a,b)}}{\min{(a,b)}}$ a function?

Published on 02 May 2015 - 20:15

score 153 · Answer 9 · 2015-05-03 14:14:11

Prove that the relation $f$: ($\mathbb{Z^*} \times \mathbb{Z^*}$) $\rightarrow$ $\mathbb{Q}$ by $f(a,b)$ = $\frac{a+b}{a+b-3ab}$ is a function

score 726 · Answer 10 · 2015-05-04 01:13:00

726

Views

Does type-theory have a concept of "relation"?

Published on 04 May 2015 - 1:13

score 114 · Answer 11 · 2015-05-04 06:55:05

114

Views

Show that the function $f:\mathbb{Z} \rightarrow \mathbb{2Z}$ by $f(a)=a^3+3a+2$ is not onto

Published on 04 May 2015 - 6:55

score 1.8k · Answer 12 · 2015-05-05 15:11:55

1.8k

Views

Can this relation be transitive but not symmetric and reflexive?

Published on 05 May 2015 - 15:11

score 1k · Answer 13 · 2015-05-05 23:12:16

1k

Views

Why is the number of subsets equal to the number of relations?

Published on 05 May 2015 - 23:12

score 742 · Answer 14 · 2015-05-06 22:23:55

742

Views

symmetry vs antisymmetry

Published on 06 May 2015 - 22:23

score 2.9k · Answer 15 · 2015-05-07 20:52:12

2.9k

Views

Find the inverse of $f(x,y) = (x+3y,3x+y)$

Published on 07 May 2015 - 20:52

List Question

Order relations and counting the number of cases (Fubini numbers)

Why is this an equivalence relation, and what does the equivalence classes contain?

Calculate transitive closure of a relation

Hasse Diagram Correct?

why are equivalence relations called so?

Intersection of two sets which are equivalence on set A is always equivalence?

Question Concerning a General Method to Show that a Relation is Not a Function

Is $f:\mathbb{Q^*} \rightarrow \mathbb{Q}$ by $f(\frac{a}{b}) = \frac{\max{(a,b)}}{\min{(a,b)}}$ a function?

Prove that the relation $f$: ($\mathbb{Z^} \times \mathbb{Z^}$) $\rightarrow$ $\mathbb{Q}$ by $f(a,b)$ = $\frac{a+b}{a+b-3ab}$ is a function

Does type-theory have a concept of "relation"?

Show that the function $f:\mathbb{Z} \rightarrow \mathbb{2Z}$ by $f(a)=a^3+3a+2$ is not onto

Can this relation be transitive but not symmetric and reflexive?

Why is the number of subsets equal to the number of relations?

symmetry vs antisymmetry

Find the inverse of $f(x,y) = (x+3y,3x+y)$

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