Question

Writing Euclid's proposition "Ratios which are the same with the same ratio are also the same with one another" in contemporary style

score 39 · Answer 1 · 2020-05-21 20:18:15

Writing Euclid's proposition "Ratios which are the same with the same ratio are also the same with one another" in contemporary style

score 42 · Answer 2 · 2026-03-27 18:26:18

42

Views

Must a binary relation on a set $X$ be defined for all elements in $X$?

Published on 27 Mar 2026 - 18:26

score 22 · Answer 3 · 2020-05-24 05:05:48

22

Views

Finding the turning point of a relation

Published on 24 May 2020 - 5:05

score 27 · Answer 4 · 2020-05-24 05:23:21

27

Views

Why the homegeneous relation $\mathcal{R}$ over a set $E$ below, isn't transitive? I concluded that it was a transitive property.

Published on 24 May 2020 - 5:23

score 243 · Answer 5 · 2026-03-29 04:10:59

243

Views

Find the number of symmetric closure

Published on 29 Mar 2026 - 4:10

score 90 · Answer 6 · 2020-05-26 11:33:08

90

Views

What do you call a relation that isn't finer than any equivalence, besides the full relation?

Published on 26 May 2020 - 11:33

score 102 · Answer 7 · 2020-05-27 08:51:23

102

Views

How to find the pre-image of a relation given the interval?

Published on 27 May 2020 - 8:51

score 53 · Answer 8 · 2020-05-27 11:42:52

53

Views

Find $f(x,y)$ when $f(x)$ and $f(y)$ are known

Published on 27 May 2020 - 11:42

score 37 · Answer 9 · 2020-05-28 02:30:35

37

Views

Find these relations on $\mathbb{N}$.

Published on 28 May 2020 - 2:30

score 41 · Answer 10 · 2020-05-28 10:56:10

41

Views

Define a relation R on Z × N by (a, α)R(b, β) if and only if aβ = bα. Prove that R is a reflexive relation.

Published on 28 May 2020 - 10:56

score 191 · Answer 11 · 2026-03-26 12:06:44

191

Views

Prove if $B$ has a smallest element, then this element is unique.

Published on 26 Mar 2026 - 12:06

score 203 · Answer 12 · 2026-03-25 11:14:54

203

Views

Are the set of all convergent geometric series whose sum is a rational number is countable?

Published on 25 Mar 2026 - 11:14

score 365 · Answer 13 · 2020-05-29 13:24:03

365

Views

How does a transitive extension differ from a transitive closure?

Published on 29 May 2020 - 13:24

score 27 · Answer 14 · 2020-05-30 21:57:20

27

Views

Is $G=\{(x,y)\in \mathbb{Z}\times\mathbb{Z}:x+y<4\}$ irreflexive?

Published on 30 May 2020 - 21:57

score 648 · Answer 15 · 2020-05-31 00:33:49

648

Views

Are sets predicates?

Published on 31 May 2020 - 0:33

List Question

Writing Euclid's proposition "Ratios which are the same with the same ratio are also the same with one another" in contemporary style

Must a binary relation on a set $X$ be defined for all elements in $X$?

Finding the turning point of a relation

Why the homegeneous relation $\mathcal{R}$ over a set $E$ below, isn't transitive? I concluded that it was a transitive property.

Find the number of symmetric closure

What do you call a relation that isn't finer than any equivalence, besides the full relation?

How to find the pre-image of a relation given the interval?

Find $f(x,y)$ when $f(x)$ and $f(y)$ are known

Find these relations on $\mathbb{N}$.

Define a relation R on Z × N by (a, α)R(b, β) if and only if aβ = bα. Prove that R is a reflexive relation.

Prove if $B$ has a smallest element, then this element is unique.

Are the set of all convergent geometric series whose sum is a rational number is countable?

How does a transitive extension differ from a transitive closure?

Is $G=\{(x,y)\in \mathbb{Z}\times\mathbb{Z}:x+y<4\}$ irreflexive?

Are sets predicates?

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