List questions from cardinals

Published on 26 Apr 2016 - 5:10

120

Views

If $p_n$ is the $n^{th}$ prime, is it ever appropriate to speak of $p_{\aleph_0}$?

Published on 27 Apr 2016 - 8:12

299

Views

Ultraproduct with no long descending sequence

Published on 27 Apr 2016 - 15:59

3.8k

Views

Why do we classify infinities in so many symbols and ideas?

Published on 02 Apr 2026 - 11:35

565

Views

Why can't you count up to aleph null?

Published on 28 Apr 2016 - 1:17

109

Views

Maximal Sets and Bijections

Published on 28 Apr 2016 - 16:19

105

Views

Why is this set club?

Published on 02 May 2016 - 1:31

942

Views

Bijection from $\mathbb {Z}^3$ to $\mathbb {Z}$

Published on 04 May 2016 - 0:36

1k

Views

Cardinality of Power set of naturals equal to $\Bbb{N}^\Bbb{N}$

Published on 05 May 2016 - 10:11

2.4k

Views

Can the unit interval map bijectively to a region?

Published on 08 May 2016 - 13:28

3.4k

Views

Prove that the set of all infinite subsets of $\mathbb{N}$ is uncountable.

Published on 08 May 2016 - 21:53

3.1k

Views

How many non-differentiable functions exist?

Published on 08 May 2016 - 22:31

1.6k

Views

What is an example of two sets which cannot be compared?

Published on 03 Apr 2026 - 22:35

143

Views

Sum of cardinals of all intersections: elegant alternative proofs?

Published on 09 May 2016 - 0:46

62

Views

Connected Linear Graph not Path-Connected

Published on 11 May 2016 - 7:38

List Question

Well-ordering of sets of cardinal numbers

If $p_n$ is the $n^{th}$ prime, is it ever appropriate to speak of $p_{\aleph_0}$?

Ultraproduct with no long descending sequence

Why do we classify infinities in so many symbols and ideas?

Why can't you count up to aleph null?

Maximal Sets and Bijections

Why is this set club?

Bijection from $\mathbb {Z}^3$ to $\mathbb {Z}$

Cardinality of Power set of naturals equal to $\Bbb{N}^\Bbb{N}$

Can the unit interval map bijectively to a region?

Prove that the set of all infinite subsets of $\mathbb{N}$ is uncountable.

How many non-differentiable functions exist?

What is an example of two sets which cannot be compared?

Sum of cardinals of all intersections: elegant alternative proofs?

Connected Linear Graph not Path-Connected

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