List questions from relations

Published on 14 Dec 2016 - 11:06

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Why is this not transitive R = {(1,1),(1,3),(2,2),(3,1)}?

Published on 15 Dec 2016 - 5:53

1.8k

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Topological sorting of a set

Published on 02 Apr 2026 - 3:34

83

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Transitive closure of R

Published on 16 Dec 2016 - 21:41

507

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Transitive, Reflexive, Symmetric Relations

Published on 17 Dec 2016 - 14:57

609

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Prove that the cardinality of the set of all reflexive relations over $\Bbb N$ is $\mathfrak c$

Published on 01 Apr 2026 - 2:05

3.5k

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Is relation $\{(1,2),(2,3),(1,3),(3,1)\}$ symmetric and transitive?

Published on 18 Dec 2016 - 14:03

177

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Finding the functions $f : \Bbb N \to \Bbb N$ which satisfy $f\circ f(x) + f(x) = 2x+15$

Published on 01 Apr 2026 - 3:12

70

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Determining a relation involving a greater than and less than condition

Published on 19 Dec 2016 - 20:54

43

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Find if the following equality is true for all relations.

Published on 20 Dec 2016 - 11:10

115

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Kramers-Kronig relationship

Published on 20 Dec 2016 - 20:03

198

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Why Greatest Lower Bound of this lattice does not exist?

Published on 29 Mar 2026 - 19:57

636

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Is Parallelism Reflexive?

Published on 21 Dec 2016 - 10:58

2.6k

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Why is $\mathbb{Z}$ not a well-ordered set?

Published on 26 Mar 2026 - 17:30

43

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R is a partial order on A, and $B\subseteq A$, prove that R is also a partial order on B

Published on 22 Dec 2016 - 15:22

List Question

Relations counting

Why is this not transitive R = {(1,1),(1,3),(2,2),(3,1)}?

Topological sorting of a set

Transitive closure of R

Transitive, Reflexive, Symmetric Relations

Prove that the cardinality of the set of all reflexive relations over $\Bbb N$ is $\mathfrak c$

Is relation $\{(1,2),(2,3),(1,3),(3,1)\}$ symmetric and transitive?

Finding the functions $f : \Bbb N \to \Bbb N$ which satisfy $f\circ f(x) + f(x) = 2x+15$

Determining a relation involving a greater than and less than condition

Find if the following equality is true for all relations.

Kramers-Kronig relationship

Why Greatest Lower Bound of this lattice does not exist?

Is Parallelism Reflexive?

Why is $\mathbb{Z}$ not a well-ordered set?

R is a partial order on A, and $B\subseteq A$, prove that R is also a partial order on B

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