List questions from cardinals

Published on 30 Dec 2020 - 16:44

52

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finite subsets proof

Published on 30 Dec 2020 - 20:33

231

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finding cardinality of set of all functions from Q to R

Published on 30 Dec 2020 - 20:56

201

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Proof that non-well-orderable sets are not equinumerous to their own cardinals (using Scott's trick)

Published on 11 Apr 2026 - 17:02

321

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dimension of infinite dimensional vector space

Published on 25 Mar 2026 - 19:01

75

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countable-to-one set cardinality

Published on 11 Apr 2026 - 23:03

97

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Bijection between $ (0,1) ^ n $ and $ (0,1) $.

Published on 12 Apr 2026 - 9:08

86

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Counting question and cardinality

Published on 12 Apr 2026 - 10:12

326

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Cardinality of an infinite tree paths

Published on 12 Apr 2026 - 5:41

55

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A question about what does $|A|^{<\omega}$ mean for a set

Published on 11 Apr 2026 - 20:19

109

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Let $T =\{X\in P(\mathbb{Q}) | X\cup \mathbb{N} = \mathbb{Q} \}$ the cardinality of $T$ is $\aleph$?

Published on 03 Jan 2021 - 12:13

107

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Rank $ (a) {\aleph_4}^{\aleph_4}, (b) {\aleph_0}^{\aleph_4}, (c) {\aleph_4}^{\aleph_0}, (d) {\aleph_4}, (e) {\aleph_5}, (f) {\aleph_5}^{\aleph_0} $

Published on 03 Jan 2021 - 18:40

61

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Intuition of countable sets using discrete sets

Published on 05 Jan 2021 - 9:05

61

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Finite sets and cardinality.

Published on 07 Jan 2021 - 9:19

76

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Exponentiation of infinite cardinals: rules involving $\max\{\kappa_1, \kappa_2\}$?

Published on 11 Apr 2026 - 10:46

List Question

equivalent properties of cardinals

finite subsets proof

finding cardinality of set of all functions from Q to R

Proof that non-well-orderable sets are not equinumerous to their own cardinals (using Scott's trick)

dimension of infinite dimensional vector space

countable-to-one set cardinality

Bijection between $ (0,1) ^ n $ and $ (0,1) $.

Counting question and cardinality

Cardinality of an infinite tree paths

A question about what does $|A|^{<\omega}$ mean for a set

Let $T =\{X\in P(\mathbb{Q}) | X\cup \mathbb{N} = \mathbb{Q} \}$ the cardinality of $T$ is $\aleph$?

Rank $ (a) {\aleph_4}^{\aleph_4}, (b) {\aleph_0}^{\aleph_4}, (c) {\aleph_4}^{\aleph_0}, (d) {\aleph_4}, (e) {\aleph_5}, (f) {\aleph_5}^{\aleph_0} $

Intuition of countable sets using discrete sets

Finite sets and cardinality.

Exponentiation of infinite cardinals: rules involving $\max\{\kappa_1, \kappa_2\}$?

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