Question

Why isn't this a contradiction? (Preimage of an open set)

score 75 · Answer 1 · 2018-11-07 07:10:11

75

Views

Why isn't this a contradiction? (Preimage of an open set)

Published on 07 Nov 2018 - 7:10

score 101 · Answer 2 · 2026-03-26 08:04:26

101

Views

Find a continuous bijection with an noncontinuous inverse in metric spaces

Published on 26 Mar 2026 - 8:04

score 467 · Answer 3 · 2018-11-07 16:06:27

467

Views

Proving continuity of a multivariable function by "reducing" it to a single variable function

Published on 07 Nov 2018 - 16:06

score 24 · Answer 4 · 2018-11-07 22:26:14

24

Views

Example of two non-homeomorphic spaces with two continual mappings between them

Published on 07 Nov 2018 - 22:26

score 90 · Answer 5 · 2018-11-08 01:27:32

90

Views

Neither piecewise continuous function nor continuous function examples

Published on 08 Nov 2018 - 1:27

score 394 · Answer 6 · 2026-03-26 06:34:55

394

Views

What is a plain English explanation of "$\epsilon$-$\delta$ criterion" and how to use it for proving continuity?

Published on 26 Mar 2026 - 6:34

score 64 · Answer 7 · 2018-11-08 11:21:11

64

Views

Example of a discontinous pseudo contraction mapping

Published on 08 Nov 2018 - 11:21

score 35 · Answer 8 · 2026-03-28 10:36:05

35

Views

Continuous function, monotonic converging sequences

Published on 28 Mar 2026 - 10:36

score 68 · Answer 9 · 2018-11-08 16:01:52

68

Views

Show that $f$ is continuous at $\frac12$

Published on 08 Nov 2018 - 16:01

score 56 · Answer 10 · 2026-03-22 18:23:37

56

Views

Absolute continuous functions property. Is it true?

Published on 22 Mar 2026 - 18:23

score 52 · Answer 11 · 2018-11-08 18:55:24

52

Views

Problem regarding proving a real valued function to be continuous.

Published on 08 Nov 2018 - 18:55

score 664 · Answer 12 · 2026-03-26 14:28:17

664

Views

Show that the support function of a bounded set is continuous.

Published on 26 Mar 2026 - 14:28

score 106 · Answer 13 · 2026-03-30 11:17:10

106

Views

Proving $(x^4-y^4) \cos (\frac{1}{\left\lVert (x,y) \right\rVert^3_2})$ is totally differentiable

Published on 30 Mar 2026 - 11:17

score 26 · Answer 14 · 2026-03-26 07:58:24

26

Views

Prove $C(t)$ varies in an absolutely continuous way

Published on 26 Mar 2026 - 7:58

score 510 · Answer 15 · 2026-03-27 03:42:24

510

Views

Proving continuity in the origin $\frac{xy}{\sqrt{x^2 + y^2}}$

Published on 27 Mar 2026 - 3:42

List Question

Why isn't this a contradiction? (Preimage of an open set)

Find a continuous bijection with an noncontinuous inverse in metric spaces

Proving continuity of a multivariable function by "reducing" it to a single variable function

Example of two non-homeomorphic spaces with two continual mappings between them

Neither piecewise continuous function nor continuous function examples

What is a plain English explanation of "$\epsilon$-$\delta$ criterion" and how to use it for proving continuity?

Example of a discontinous pseudo contraction mapping

Continuous function, monotonic converging sequences

Show that $f$ is continuous at $\frac12$

Absolute continuous functions property. Is it true?

Problem regarding proving a real valued function to be continuous.

Show that the support function of a bounded set is continuous.

Proving $(x^4-y^4) \cos (\frac{1}{\left\lVert (x,y) \right\rVert^3_2})$ is totally differentiable

Prove $C(t)$ varies in an absolutely continuous way

Proving continuity in the origin $\frac{xy}{\sqrt{x^2 + y^2}}$

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