Question

Is infinity part of the boundary of R^n?

score 776 · Answer 1 · 2018-09-02 10:57:16

776

Views

Is infinity part of the boundary of R^n?

Published on 02 Sep 2018 - 10:57

score 592 · Answer 2 · 2018-09-05 17:46:55

592

Views

Does there exist an interval on the reals, however small, in which every number is irrational?

Published on 05 Sep 2018 - 17:46

score 76 · Answer 3 · 2018-09-10 03:20:10

76

Views

What is $(-1)^\infty$, or $(-1)^x$ as the limit of $x$ approaches infinity?

Published on 10 Sep 2018 - 3:20

score 64 · Answer 4 · 2018-09-10 11:13:16

64

Views

A wrong definition of infinity and a doubt about its modification

Published on 10 Sep 2018 - 11:13

score 1.1k · Answer 5 · 2018-09-10 15:48:19

1.1k

Views

Suppose $X$ is infinite and $A$ is a finite subset of $X$. Then $X$ and $X \setminus A$ are equinumerous

Published on 10 Sep 2018 - 15:48

score 110 · Answer 6 · 2026-03-25 02:59:26

110

Views

Backwards Zeno's Paradox

Published on 25 Mar 2026 - 2:59

score 1.6k · Answer 7 · 2018-09-11 14:54:14

1.6k

Views

Precise meaning of infinitely many

Published on 11 Sep 2018 - 14:54

score 432 · Answer 8 · 2018-09-12 10:01:08

432

Views

Let $X$ be uncountable and $A$ be a countable subset of $X$. Then $X$ and $X \setminus A$ are equinumerous

Published on 12 Sep 2018 - 10:01

score 264 · Answer 9 · 2026-03-25 06:18:50

264

Views

An infinite division and balls problem

Published on 25 Mar 2026 - 6:18

score 568 · Answer 10 · 2018-09-12 19:18:47

568

Views

The limit of $\frac{n^3-3}{2n^2+n-1}$

Published on 12 Sep 2018 - 19:18

score 272 · Answer 11 · 2018-09-13 10:04:08

272

Views

Suppose $X$ is infinite and $A$ is a finite subset of $X$. Then $X$ and $X\setminus A$ are equinumerous

Published on 13 Sep 2018 - 10:04

score 136 · Answer 12 · 2018-09-13 16:19:20

136

Views

Let $X$ be infinite. Then $X$ and $X\times\Bbb N$ are equinumerous

Published on 13 Sep 2018 - 16:19

score 438 · Answer 13 · 2026-03-25 03:03:14

438

Views

Why Hilbert changes the property of a set in his Infinite hotel?

Published on 25 Mar 2026 - 3:03

score 634 · Answer 14 · 2018-09-14 06:20:25

634

Views

If $X$ is infinite, then $X$ and $X\times X$ are equinumerous

Published on 14 Sep 2018 - 6:20

score 529 · Answer 15 · 2018-09-14 11:29:28

529

Views

Partition an infinite set into countable sets

Published on 14 Sep 2018 - 11:29

List Question

Is infinity part of the boundary of R^n?

Does there exist an interval on the reals, however small, in which every number is irrational?

What is $(-1)^\infty$, or $(-1)^x$ as the limit of $x$ approaches infinity?

A wrong definition of infinity and a doubt about its modification

Suppose $X$ is infinite and $A$ is a finite subset of $X$. Then $X$ and $X \setminus A$ are equinumerous

Backwards Zeno's Paradox

Precise meaning of infinitely many

Let $X$ be uncountable and $A$ be a countable subset of $X$. Then $X$ and $X \setminus A$ are equinumerous

An infinite division and balls problem

The limit of $\frac{n^3-3}{2n^2+n-1}$

Suppose $X$ is infinite and $A$ is a finite subset of $X$. Then $X$ and $X\setminus A$ are equinumerous

Let $X$ be infinite. Then $X$ and $X\times\Bbb N$ are equinumerous

Why Hilbert changes the property of a set in his Infinite hotel?

If $X$ is infinite, then $X$ and $X\times X$ are equinumerous

Partition an infinite set into countable sets

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