List questions from examples-counterexamples

Published on 13 Apr 2026 - 19:02

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What is the intuition between 1-cocycles (group cohomology)?

Published on 18 Apr 2026 - 1:50

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counterexample topology first countable

Published on 10 Apr 2026 - 16:54

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Functions without Laplace transform?

Published on 19 Apr 2026 - 16:20

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Examples of functions $f$ and $g$ such that one of them is not differentiable but $f+g$ is differentiable

Published on 16 Apr 2026 - 2:03

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Example of a group where $o(a)$ and $o(b)$ are finite but $o(ab)$ is infinite

Published on 16 Apr 2026 - 10:31

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example of a finite coloring without infinite monochromatic set closed under addition

Published on 14 Apr 2026 - 21:20

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Abstract Algebra: Equivalence Classes Under ~(conjugate) Relation

Published on 15 Apr 2026 - 15:33

93

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Does there exist a tournament with loops where the numbers of loops is strictly smaller than the number of vertices?

Published on 12 Apr 2026 - 0:36

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Would the following NFA accept all strings?

Published on 12 Apr 2026 - 19:51

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Supremum conditions for equicontinuity

Published on 12 Apr 2026 - 7:30

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$A$ square matrix,nonsingular $\implies $ all submatrixes of $A$ are also nonsingular?

Published on 13 Apr 2026 - 19:57

182

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If two open sets are distinct, do they necessarily have distinct boundaries?

Published on 12 Apr 2026 - 17:37

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Intersection of nested dense subsets.

Published on 14 Apr 2026 - 10:51

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A complex function that is harmonic but not analytic

Published on 12 Apr 2026 - 21:59

List Question

A question on isolated point

What is the intuition between 1-cocycles (group cohomology)?

counterexample topology first countable

Functions without Laplace transform?

Examples of functions $f$ and $g$ such that one of them is not differentiable but $f+g$ is differentiable

Example of a group where $o(a)$ and $o(b)$ are finite but $o(ab)$ is infinite

example of a finite coloring without infinite monochromatic set closed under addition

Abstract Algebra: Equivalence Classes Under ~(conjugate) Relation

Does there exist a tournament with loops where the numbers of loops is strictly smaller than the number of vertices?

Would the following NFA accept all strings?

Supremum conditions for equicontinuity

$A$ square matrix,nonsingular $\implies $ all submatrixes of $A$ are also nonsingular?

If two open sets are distinct, do they necessarily have distinct boundaries?

Intersection of nested dense subsets.

A complex function that is harmonic but not analytic

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