Question

When might identifying singleton subsets with their (single) elements "cause confusion"?

score 46 · Answer 1 · 2018-01-24 23:32:05

46

Views

When might identifying singleton subsets with their (single) elements "cause confusion"?

Published on 24 Jan 2018 - 23:32

score 1k · Answer 2 · 2018-01-25 15:02:52

1k

Views

Show whether $R=\{(x,y):x^2+2y=8\}$ is reflexive, symmetric, or transitive

Published on 25 Jan 2018 - 15:02

score 376 · Answer 3 · 2026-03-23 13:24:30

376

Views

Symmetric difference as a equivalent relation-equivalence classes

Published on 23 Mar 2026 - 13:24

score 163 · Answer 4 · 2026-03-22 16:36:42

163

Views

Relations as Sets of Ordered Pairs

Published on 22 Mar 2026 - 16:36

score 66 · Answer 5 · 2026-03-23 23:41:14

66

Views

Is $R$ symmetric and transitive?

Published on 23 Mar 2026 - 23:41

score 45 · Answer 6 · 2026-03-24 20:32:03

45

Views

How to find the recurrence relation for ordering inspired by $<$ and $=$ relations?

Published on 24 Mar 2026 - 20:32

score 30 · Answer 7 · 2026-03-17 01:33:15

30

Views

Matching pans with a fitting lid

Published on 17 Mar 2026 - 1:33

score 199 · Answer 8 · 2018-01-31 21:00:12

199

Views

What is the correct notation to denote the ordered/unordered concatenation of two strings?

Published on 31 Jan 2018 - 21:00

score 681 · Answer 9 · 2026-03-17 15:56:09

681

Views

Finding Nerode equivalence classes of non regular languages

Published on 17 Mar 2026 - 15:56

score 167 · Answer 10 · 2026-03-16 17:16:33

167

Views

Number of relations.

Published on 16 Mar 2026 - 17:16

score 38 · Answer 11 · 2026-03-17 05:04:55

38

Views

Simple problem of relations which are symmetric

Published on 17 Mar 2026 - 5:04

score 750 · Answer 12 · 2026-03-20 03:21:27

750

Views

Quickly determining whether given lattice is a distributive lattice from a given Hasse diagram

Published on 20 Mar 2026 - 3:21

score 113 · Answer 13 · 2026-03-22 07:10:20

113

Views

Let $A$ be a finite set such that $|A|=n+1$ for some $2\le n$ and let $R\subseteq A\times A$ be some reflexive relation in $A$. Prove the following:

Published on 22 Mar 2026 - 7:10

score 54 · Answer 14 · 2026-03-12 19:46:03

54

Views

Proof Verification and Help: Showing a Map is Well-defined and a Bijection

Published on 12 Mar 2026 - 19:46

score 204 · Answer 15 · 2026-03-24 10:47:00

204

Views

Prove that $f(x+y)=f(x)+f(y)$, and $f(x\cdot y) = f(x)\cdot f(y)$ implies $f:\mathbb{R} \to \mathbb{R}'$ is a bijective mapping that preserves order.

Published on 24 Mar 2026 - 10:47

List Question

When might identifying singleton subsets with their (single) elements "cause confusion"?

Show whether $R=\{(x,y):x^2+2y=8\}$ is reflexive, symmetric, or transitive

Symmetric difference as a equivalent relation-equivalence classes

Relations as Sets of Ordered Pairs

Is $R$ symmetric and transitive?

How to find the recurrence relation for ordering inspired by $<$ and $=$ relations?

Matching pans with a fitting lid

What is the correct notation to denote the ordered/unordered concatenation of two strings?

Finding Nerode equivalence classes of non regular languages

Number of relations.

Simple problem of relations which are symmetric

Quickly determining whether given lattice is a distributive lattice from a given Hasse diagram

Let $A$ be a finite set such that $|A|=n+1$ for some $2\le n$ and let $R\subseteq A\times A$ be some reflexive relation in $A$. Prove the following:

Proof Verification and Help: Showing a Map is Well-defined and a Bijection

Prove that $f(x+y)=f(x)+f(y)$, and $f(x\cdot y) = f(x)\cdot f(y)$ implies $f:\mathbb{R} \to \mathbb{R}'$ is a bijective mapping that preserves order.

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