Question

Sets and Logic .. Disproving with counter example

score 932 · Answer 1 · 2014-09-14 00:01:27

932

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Sets and Logic .. Disproving with counter example

Published on 14 Sep 2014 - 0:01

score 476 · Answer 2 · 2014-09-14 18:29:16

476

Views

Can the derivative of an absolutely continuous real function have a simple discontinuity?

Published on 14 Sep 2014 - 18:29

score 800 · Answer 3 · 2026-03-26 17:29:33

800

Views

Vector space without a scalar product

Published on 26 Mar 2026 - 17:29

score 265 · Answer 4 · 2014-09-17 09:56:14

265

Views

A Real valued function which is discontinuous only on a given specific set.

Published on 17 Sep 2014 - 9:56

score 1.2k · Answer 5 · 2026-03-25 14:23:55

1.2k

Views

Why is a monoid with right identity and left inverse not necessarily a group?

Published on 25 Mar 2026 - 14:23

score 27 · Answer 6 · 2026-03-29 19:07:50

27

Views

Basic calculus question with continuous function

Published on 29 Mar 2026 - 19:07

score 176 · Answer 7 · 2014-09-18 14:40:51

176

Views

Counterexamples for $f(\overline{A}) = \overline{f(A)}$ and $\overline{f^{-1}(B)} = f^{-1}(\overline{B})$ in (non-)continuous mapping $f: X \to Y$

Published on 18 Sep 2014 - 14:40

score 3.5k · Answer 8 · 2014-09-19 02:45:23

3.5k

Views

Are primitive row stochastic matrices diagonalizable?

Published on 19 Sep 2014 - 2:45

score 316 · Answer 9 · 2014-09-19 08:35:38

316

Views

Example of a locally compact metric space whose completion is not locally compact

Published on 19 Sep 2014 - 8:35

score 57 · Answer 10 · 2014-09-19 18:08:26

57

Views

Can we find a countable subset of the real numbers which give us an outer jordan measure 1 but lebesgue 0?

Published on 19 Sep 2014 - 18:08

score 2.4k · Answer 11 · 2014-09-21 23:31:36

2.4k

Views

Proving the derived set $E'$ is closed.

Published on 21 Sep 2014 - 23:31

score 111 · Answer 12 · 2026-03-26 23:09:30

111

Views

Module over an associative ring with unity and axioms of projective geometry

Published on 26 Mar 2026 - 23:09

score 1.6k · Answer 13 · 2014-09-22 12:40:29

1.6k

Views

A derivative which is not Lebesgue integrable on any interval?

Published on 22 Sep 2014 - 12:40

score 12.8k · Answer 14 · 2014-09-22 18:14:04

12.8k

Views

Examples of compact sets that are infinite dimensional and not bounded

Published on 22 Sep 2014 - 18:14

score 435 · Answer 15 · 2014-09-23 05:09:25

435

Views

How to construct a smooth curve whose range is dense in $\mathbb R^2$?

Published on 23 Sep 2014 - 5:09

List Question

Sets and Logic .. Disproving with counter example

Can the derivative of an absolutely continuous real function have a simple discontinuity?

Vector space without a scalar product

A Real valued function which is discontinuous only on a given specific set.

Why is a monoid with right identity and left inverse not necessarily a group?

Basic calculus question with continuous function

Counterexamples for $f(\overline{A}) = \overline{f(A)}$ and $\overline{f^{-1}(B)} = f^{-1}(\overline{B})$ in (non-)continuous mapping $f: X \to Y$

Are primitive row stochastic matrices diagonalizable?

Example of a locally compact metric space whose completion is not locally compact

Can we find a countable subset of the real numbers which give us an outer jordan measure 1 but lebesgue 0?

Proving the derived set $E'$ is closed.

Module over an associative ring with unity and axioms of projective geometry

A derivative which is not Lebesgue integrable on any interval?

Examples of compact sets that are infinite dimensional and not bounded

How to construct a smooth curve whose range is dense in $\mathbb R^2$?

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