Question

if a relation is reflexive, symmetric, or transitive

score 35 · Answer 1 · 2018-04-05 16:37:28

35

Views

if a relation is reflexive, symmetric, or transitive

Published on 05 Apr 2018 - 16:37

score 219 · Answer 2 · 2026-03-22 14:00:32

219

Views

If $\forall x,y \in B$ if $(x,y) \in S$ and if $x+y$ is even then $x=y$ then each class of $S$ has at most $2$ elements

Published on 22 Mar 2026 - 14:00

score 40 · Answer 3 · 2018-04-06 09:53:10

40

Views

Is it true that $\forall x\in \mathbb Z: (-x-1,x)\in R^2$ if $(x,y)\in R \iff x^2+x = y^2+y$?

Published on 06 Apr 2018 - 9:53

score 11.2k · Answer 4 · 2026-03-21 20:34:33

11.2k

Views

prove that if $a=b$ then $a+c=b+c$ where $a,b,c\in \mathbb R$

Published on 21 Mar 2026 - 20:34

score 313 · Answer 5 · 2018-04-07 12:31:14

313

Views

How to write $x$ is not related to $y$ in binary relations?

Published on 07 Apr 2018 - 12:31

score 1k · Answer 6 · 2026-03-22 15:55:02

1k

Views

Equivalence Classes for $R = \{ (x, y) \ | \ f(x) = f(y) \}$

Published on 22 Mar 2026 - 15:55

score 171 · Answer 7 · 2026-03-22 05:11:00

171

Views

For each $y \in Y$, the pre-image of $y$, usually denoted $f^{-1}(y)$, is an equivalence class. How does this qualify as an equivalence class?

Published on 22 Mar 2026 - 5:11

score 1.6k · Answer 8 · 2026-03-22 04:07:31

1.6k

Views

Equivalence Relations: x~y if and only if {x,y} ⊂ X or {x,y} ⊂ (Y\X)

Published on 22 Mar 2026 - 4:07

score 24 · Answer 9 · 2018-04-09 06:15:48

24

Views

If $B$ is a set ordered (partially or fully) under $S$ then $S=S^2$?

Published on 09 Apr 2018 - 6:15

score 50 · Answer 10 · 2026-03-25 01:18:44

50

Views

What is the relation in terms of the integral $\int_{b}^{a}(cos( b)-cos( x))^\frac{1}{2}dx$?

Published on 25 Mar 2026 - 1:18

score 60 · Answer 11 · 2018-04-10 02:58:45

60

Views

An example where $R\circ R^{-1}=i_A$ but $R^{-1}\circ R\ne i_A$

Published on 10 Apr 2018 - 2:58

score 232 · Answer 12 · 2018-04-10 05:58:40

232

Views

How to determine existence of greatest and least element on order relation over non numbers?

Published on 10 Apr 2018 - 5:58

score 46 · Answer 13 · 2018-04-10 10:52:58

46

Views

composition of binary relation with condition

Published on 10 Apr 2018 - 10:52

score 67 · Answer 14 · 2018-04-10 21:59:56

67

Views

Help understanding anti- symmetric and irreflexive property

Published on 10 Apr 2018 - 21:59

score 45 · Answer 15 · 2018-04-11 01:34:56

45

Views

Right Hasse diagram for a partial order?

Published on 11 Apr 2018 - 1:34

List Question

if a relation is reflexive, symmetric, or transitive

If $\forall x,y \in B$ if $(x,y) \in S$ and if $x+y$ is even then $x=y$ then each class of $S$ has at most $2$ elements

Is it true that $\forall x\in \mathbb Z: (-x-1,x)\in R^2$ if $(x,y)\in R \iff x^2+x = y^2+y$?

prove that if $a=b$ then $a+c=b+c$ where $a,b,c\in \mathbb R$

How to write $x$ is not related to $y$ in binary relations?

Equivalence Classes for $R = \{ (x, y) \ | \ f(x) = f(y) \}$

For each $y \in Y$, the pre-image of $y$, usually denoted $f^{-1}(y)$, is an equivalence class. How does this qualify as an equivalence class?

Equivalence Relations: x~y if and only if {x,y} ⊂ X or {x,y} ⊂ (Y\X)

If $B$ is a set ordered (partially or fully) under $S$ then $S=S^2$?

What is the relation in terms of the integral $\int_{b}^{a}(cos( b)-cos( x))^\frac{1}{2}dx$?

An example where $R\circ R^{-1}=i_A$ but $R^{-1}\circ R\ne i_A$

How to determine existence of greatest and least element on order relation over non numbers?

composition of binary relation with condition

Help understanding anti- symmetric and irreflexive property

Right Hasse diagram for a partial order?

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