Question

Cardinal exponentiation question of infinite cardinals.

score 311 · Answer 1 · 2026-03-31 04:28:31

311

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Cardinal exponentiation question of infinite cardinals.

Published on 31 Mar 2026 - 4:28

score 83 · Answer 2 · 2016-04-01 05:23:31

83

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Showing the cardinality of a bounded shape in the xy plane?

Published on 01 Apr 2016 - 5:23

score 27 · Answer 3 · 2016-04-01 05:43:32

27

Views

Finding the cardinality of a collection of lines?

Published on 01 Apr 2016 - 5:43

score 826 · Answer 4 · 2016-04-01 15:45:23

How to create a bijection from the union of the set natural numbers and square root 2 to the set of natural numbers?

score 491 · Answer 5 · 2026-03-27 05:39:06

491

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Show that the set of powers of ten is countably infinite

Published on 27 Mar 2026 - 5:39

score 639 · Answer 6 · 2016-04-03 11:00:35

639

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Exponential of cardinal numbers

Published on 03 Apr 2016 - 11:00

score 159 · Answer 7 · 2016-04-04 22:55:29

159

Views

Continuum hypothesis : Number of connected components of $A^c$ in $\Bbb R$

Published on 04 Apr 2016 - 22:55

score 259 · Answer 8 · 2016-04-05 16:00:47

259

Views

$y\mapsto 10^y$ Bijection between integers and powers of 10

Published on 05 Apr 2016 - 16:00

score 328 · Answer 9 · 2016-04-05 17:33:35

328

Views

The fundamental group of a wedge sum of countably many circles is countably generated, hence countable.

Published on 05 Apr 2016 - 17:33

score 257 · Answer 10 · 2016-04-05 19:08:23

257

Views

Perfect Sets of real numbers have the same cardinality as the reals

Published on 05 Apr 2016 - 19:08

score 662 · Answer 11 · 2016-04-10 00:24:49

662

Views

Set of increasing functions from N to N is uncountable

Published on 10 Apr 2016 - 0:24

score 98 · Answer 12 · 2016-04-10 17:43:11

98

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Proving cardinality of an uncountable sum

Published on 10 Apr 2016 - 17:43

score 29 · Answer 13 · 2016-04-10 21:05:52

29

Views

Constructing $2^\kappa$ vectors with a certain property

Published on 10 Apr 2016 - 21:05

score 255 · Answer 14 · 2016-04-11 05:59:29

255

Views

Number of subsets with the same cardinality

Published on 11 Apr 2016 - 5:59

score 227 · Answer 15 · 2026-04-03 20:57:06

227

Views

Does $\operatorname{card}(X) < \operatorname{card}(Y)$ imply $\operatorname{card}(X^2) < \operatorname{card}(Y^2)$ without choice?

Published on 03 Apr 2026 - 20:57

List Question

Cardinal exponentiation question of infinite cardinals.

Showing the cardinality of a bounded shape in the xy plane?

Finding the cardinality of a collection of lines?

How to create a bijection from the union of the set natural numbers and square root 2 to the set of natural numbers?

Show that the set of powers of ten is countably infinite

Exponential of cardinal numbers

Continuum hypothesis : Number of connected components of $A^c$ in $\Bbb R$

$y\mapsto 10^y$ Bijection between integers and powers of 10

The fundamental group of a wedge sum of countably many circles is countably generated, hence countable.

Perfect Sets of real numbers have the same cardinality as the reals

Set of increasing functions from N to N is uncountable

Proving cardinality of an uncountable sum

Constructing $2^\kappa$ vectors with a certain property

Number of subsets with the same cardinality

Does $\operatorname{card}(X) < \operatorname{card}(Y)$ imply $\operatorname{card}(X^2) < \operatorname{card}(Y^2)$ without choice?

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