Question

Cofinality of Nowhere Dense Ideal

score 61 · Answer 1 · 2026-04-11 18:00:12

61

Views

Cofinality of Nowhere Dense Ideal

Published on 11 Apr 2026 - 18:00

score 58 · Answer 2 · 2020-10-08 02:09:47

58

Views

Can the bitstreams be put into a $1$ to $1$ correspondence with themselves?

Published on 08 Oct 2020 - 2:09

score 215 · Answer 3 · 2020-10-12 20:06:35

215

Views

Puzzled by the rule of addition for infinite (transfinite) cardinals..

Published on 12 Oct 2020 - 20:06

score 187 · Answer 4 · 2026-03-30 12:00:24

187

Views

Cardinality of the set $ \{ z \in \mathbb C : e^{z} = z \}$

Published on 30 Mar 2026 - 12:00

score 68 · Answer 5 · 2026-04-08 04:12:04

68

Views

Arithmetic on $ \aleph_0 $ such as $ \aleph_0 + 1 $ and $ \aleph_0 - 1 $

Published on 08 Apr 2026 - 4:12

score 64 · Answer 6 · 2026-04-12 14:40:08

64

Views

Given a collection $C$ of sets, prove that there is $X\in C$ of minimal cardinality.

Published on 12 Apr 2026 - 14:40

score 100 · Answer 7 · 2026-04-12 06:49:35

100

Views

$\aleph_0$ like cardinalities

Published on 12 Apr 2026 - 6:49

score 119 · Answer 8 · 2020-10-18 16:50:14

119

Views

Why should someone use decimal expansion of a real number when that decimal expansion is ITSELF a real number?

Published on 18 Oct 2020 - 16:50

score 53 · Answer 9 · 2026-04-09 17:30:38

53

Views

Adding infinite cardinalities

Published on 09 Apr 2026 - 17:30

score 28 · Answer 10 · 2026-04-06 03:41:56

28

Views

Let $m$ be a cardinal number less than $q$. Prove that a set of cardinality $q$ contains a subset of cardinality $m$.

Published on 06 Apr 2026 - 3:41

score 71 · Answer 11 · 2026-04-10 16:54:21

71

Views

Countability with Disks?

Published on 10 Apr 2026 - 16:54

score 79 · Answer 12 · 2026-04-10 18:20:31

79

Views

Is the following infinite set countable?

Published on 10 Apr 2026 - 18:20

score 731 · Answer 13 · 2020-10-23 10:38:13

731

Views

Is the set of trees over countably infinite vertices countable or uncountable?

Published on 23 Oct 2020 - 10:38

score 85 · Answer 14 · 2026-04-07 21:23:21

85

Views

Cardinality of $X \in \mathcal P(\mathbb R)$ such that $x \neq y \in X \implies x-y\in \mathbb R \setminus \mathbb Q$

Published on 07 Apr 2026 - 21:23

score 33 · Answer 15 · 2020-10-27 20:41:27

33

Views

Does $\mathbb{Q}^n$ have larger cardinality than the set $\{(a_1,a_2,...) : a_i ∈ \mathbb{Z}\}$?

Published on 27 Oct 2020 - 20:41

List Question

Cofinality of Nowhere Dense Ideal

Can the bitstreams be put into a $1$ to $1$ correspondence with themselves?

Puzzled by the rule of addition for infinite (transfinite) cardinals..

Cardinality of the set $ \{ z \in \mathbb C : e^{z} = z \}$

Arithmetic on $ \aleph_0 $ such as $ \aleph_0 + 1 $ and $ \aleph_0 - 1 $

Given a collection $C$ of sets, prove that there is $X\in C$ of minimal cardinality.

$\aleph_0$ like cardinalities

Why should someone use decimal expansion of a real number when that decimal expansion is ITSELF a real number?

Adding infinite cardinalities

Let $m$ be a cardinal number less than $q$. Prove that a set of cardinality $q$ contains a subset of cardinality $m$.

Countability with Disks?

Is the following infinite set countable?

Is the set of trees over countably infinite vertices countable or uncountable?

Cardinality of $X \in \mathcal P(\mathbb R)$ such that $x \neq y \in X \implies x-y\in \mathbb R \setminus \mathbb Q$

Does $\mathbb{Q}^n$ have larger cardinality than the set $\{(a_1,a_2,...) : a_i ∈ \mathbb{Z}\}$?

Trending Questions

Popular # Hahtags

Popular Questions