List questions from relations

454

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Equivalence relation question with cardinality and countability $A=\mathbb R,\ aSb \iff a-b\in \mathbb Q $

Published on 07 Apr 2026 - 8:33

6.5k

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Main Theorems/Techniques for proving Homeomorphism?

Published on 21 Dec 2013 - 18:27

112

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Induced mappings

Published on 10 Apr 2026 - 11:24

51

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What kind of relation is this?

Published on 25 Dec 2013 - 5:10

24

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How to show that $|A/R|=|A|/n$.

Published on 27 Dec 2013 - 12:59

3.4k

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How to find inverse of function $f(x, y)$?

Published on 10 Apr 2026 - 8:55

48

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Points of a relation

Published on 30 Dec 2013 - 8:48

257

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If $E_1$ and $E_2$ are equivalence relations, is $E_1\circ E_2$ an equivalence relation?

Published on 07 Apr 2026 - 8:32

86

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$M_1 = (x,y)\quad x²+y²+6y = 7 $ to $x \rightarrow y$

Published on 01 Jan 2014 - 12:07

158

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Rigorous definition of relation composition

Published on 11 Apr 2026 - 6:24

186

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Does(n't) associativity of functional composition follow straightaway from associativity of relational composition?

Published on 09 Apr 2026 - 15:17

234

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Does $\neg(x > y)$ imply that $y \geq x$?

Published on 05 Jan 2014 - 22:05

78

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Calculating a union of 2 relations

Published on 11 Apr 2026 - 9:40

124

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Number of Relations

Published on 11 Apr 2026 - 13:52

1.1k

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To find $R\circ R^{-1}$ in Discrete mathematics

Published on 11 Jan 2014 - 19:01

List Question

Equivalence relation question with cardinality and countability $A=\mathbb R,\ aSb \iff a-b\in \mathbb Q $

Main Theorems/Techniques for proving Homeomorphism?

Induced mappings

What kind of relation is this?

How to show that $|A/R|=|A|/n$.

How to find inverse of function $f(x, y)$?

Points of a relation

If $E_1$ and $E_2$ are equivalence relations, is $E_1\circ E_2$ an equivalence relation?

$M_1 = (x,y)\quad x²+y²+6y = 7 $ to $x \rightarrow y$

Rigorous definition of relation composition

Does(n't) associativity of functional composition follow straightaway from associativity of relational composition?

Does $\neg(x > y)$ imply that $y \geq x$?

Calculating a union of 2 relations

Number of Relations

To find $R\circ R^{-1}$ in Discrete mathematics

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