List questions from examples-counterexamples

Published on 14 Apr 2026 - 5:20

73

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Counterexample to domain additivity of uniformly continuous function

Published on 10 Apr 2026 - 23:43

124

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Is there any example of nontrivial vector bundles in infinite dimensional Banach space?

Published on 16 Apr 2026 - 7:47

108

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Counter-example to this property in euclidean geometry?

Published on 16 Apr 2026 - 15:21

118

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Turbo (uh, NOT!) method for calculating GCD?

Published on 13 Apr 2026 - 8:10

146

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Existence of an asymptote for $g(x)=\frac{f(x)f'(x)+f(1)f'(1)}{f'(x)+f'(1)}-f\left(\frac{xf'(x)+f'(1)}{f'(x)+f'(1)}\right)$

Published on 17 Apr 2026 - 8:09

173

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Finite Concepts that Require Infinity.

Published on 12 Apr 2026 - 5:39

40

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Induction step other than $1$

Published on 15 Apr 2026 - 14:58

60

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Let $G,K$ be groups with $H\le G$. It is not always possible to extend a homomorphism $\sigma:H\to K$ to $G$

Published on 10 Apr 2026 - 21:52

174

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A Regular Space that isn't Tychonoff

Published on 15 Apr 2026 - 22:23

124

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Testing for isomorphism between normal subgroup lattices

Published on 15 Apr 2026 - 3:22

77

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Let $\mu$ and $ \nu$ be measures on $(\mathscr \Omega , \mathscr F )$

Published on 25 Apr 2026 - 9:46

205

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(Topologically) different tangent bundles on the same manifold

Published on 15 Apr 2026 - 3:29

93

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Cardinality of Hamel basis of a separable incomplete inner product space

Published on 15 Apr 2026 - 10:07

32

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Function which the limit is the same for every point, but the function is not the same for every point

Published on 10 Apr 2026 - 5:17

List Question

Translates by infinite subset of finite index subgroup

Counterexample to domain additivity of uniformly continuous function

Is there any example of nontrivial vector bundles in infinite dimensional Banach space?

Counter-example to this property in euclidean geometry?

Turbo (uh, NOT!) method for calculating GCD?

Existence of an asymptote for $g(x)=\frac{f(x)f'(x)+f(1)f'(1)}{f'(x)+f'(1)}-f\left(\frac{xf'(x)+f'(1)}{f'(x)+f'(1)}\right)$

Finite Concepts that Require Infinity.

Induction step other than $1$

Let $G,K$ be groups with $H\le G$. It is not always possible to extend a homomorphism $\sigma:H\to K$ to $G$

A Regular Space that isn't Tychonoff

Testing for isomorphism between normal subgroup lattices

Let $\mu$ and $ \nu$ be measures on $(\mathscr \Omega , \mathscr F )$

(Topologically) different tangent bundles on the same manifold

Cardinality of Hamel basis of a separable incomplete inner product space

Function which the limit is the same for every point, but the function is not the same for every point

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