Question

True or False: Countable vs. Uncountable Sets

score 353 · Answer 1 · 2026-03-21 22:09:10

353

Views

True or False: Countable vs. Uncountable Sets

Published on 21 Mar 2026 - 22:09

score 248 · Answer 2 · 2026-03-26 14:16:09

248

Views

Is a vector space with countable basis is countable?

Published on 26 Mar 2026 - 14:16

score 68 · Answer 3 · 2026-03-22 07:17:25

68

Views

Proving $A\setminus B$ is an infinite set

Published on 22 Mar 2026 - 7:17

score 30 · Answer 4 · 2026-03-21 19:23:34

30

Views

Is a function a digraph?

Published on 21 Mar 2026 - 19:23

score 1.2k · Answer 5 · 2026-03-22 10:44:57

1.2k

Views

Calculate the union of three sets based only on the values in each set and their pairwise intersections

Published on 22 Mar 2026 - 10:44

score 62 · Answer 6 · 2026-03-25 10:53:40

62

Views

Showing $\cfrac ab$ is not an integer, $a$, $b$ integers

Published on 25 Mar 2026 - 10:53

score 125 · Answer 7 · 2026-03-22 15:42:54

Are there any subsets $A, B$ of $\mathbb R$ such that $\sup(B)>\sup(A)$ but none of the elements of $B$ are upperbounds of $A$?

score 112 · Answer 8 · 2026-04-10 19:39:07

112

Views

If ${A \subseteq B}$, then ${A \cup B = B}$

Published on 10 Apr 2026 - 19:39

score 45 · Answer 9 · 2026-03-22 08:07:50

45

Views

Given a set $A \subseteq R$,$i \in Z$ ,$A_i=A+i$, $\bigcup_i A_i=R$,{$A_i$} pairwise disjoint, is $A$ necessary an interval?

Published on 22 Mar 2026 - 8:07

score 68 · Answer 10 · 2026-03-21 18:06:51

68

Views

A maximum number of numbers which can be chosen from the set $\{1, 2, ..., 12\}$

Published on 21 Mar 2026 - 18:06

score 77 · Answer 11 · 2026-03-21 18:21:22

77

Views

Given a set $A_q \subseteq R$,$n \in Z$ ,$q \in Q$ ,$A_n=A_q+nq$, $\bigcup_n A_n=R$,{$A_n$} pairwise disjoint , is $A_q$ a measurable set??

Published on 21 Mar 2026 - 18:21

score 187 · Answer 12 · 2026-03-22 05:39:24

187

Views

Set theory: how is $\left\lbrace 1, 1 \right\rbrace$ different from $\left\lbrace 1 \right\rbrace$?

Published on 22 Mar 2026 - 5:39

score 1.2k · Answer 13 · 2026-03-22 01:33:32

1.2k

Views

Prove or disprove the statement: A ∩ (B ∪ C) = (A ∩ B ) ∪ C. How to show that x exists in all the sets?

Published on 22 Mar 2026 - 1:33

score 58 · Answer 14 · 2026-04-01 11:03:49

58

Views

Members of sets related to subsets

Published on 01 Apr 2026 - 11:03

score 807 · Answer 15 · 2026-03-21 14:46:38

807

Views

Simple probability and sample space problem.

Published on 21 Mar 2026 - 14:46

List Question

True or False: Countable vs. Uncountable Sets

Is a vector space with countable basis is countable?

Proving $A\setminus B$ is an infinite set

Is a function a digraph?

Calculate the union of three sets based only on the values in each set and their pairwise intersections

Showing $\cfrac ab$ is not an integer, $a$, $b$ integers

Are there any subsets $A, B$ of $\mathbb R$ such that $\sup(B)>\sup(A)$ but none of the elements of $B$ are upperbounds of $A$?

If ${A \subseteq B}$, then ${A \cup B = B}$

Given a set $A \subseteq R$,$i \in Z$ ,$A_i=A+i$, $\bigcup_i A_i=R$,{$A_i$} pairwise disjoint, is $A$ necessary an interval?

A maximum number of numbers which can be chosen from the set $\{1, 2, ..., 12\}$

Given a set $A_q \subseteq R$,$n \in Z$ ,$q \in Q$ ,$A_n=A_q+nq$, $\bigcup_n A_n=R$,{$A_n$} pairwise disjoint , is $A_q$ a measurable set??

Set theory: how is $\left\lbrace 1, 1 \right\rbrace$ different from $\left\lbrace 1 \right\rbrace$?

Prove or disprove the statement: A ∩ (B ∪ C) = (A ∩ B ) ∪ C. How to show that x exists in all the sets?

Members of sets related to subsets

Simple probability and sample space problem.

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