List questions from examples-counterexamples

Published on 08 Apr 2026 - 10:07

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Specific family of functions?

Published on 09 Apr 2026 - 20:17

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Example of uniform but not normal convergence

Published on 12 Apr 2026 - 19:15

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Find a sequence of random variables

Published on 15 Apr 2026 - 10:57

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Disprove $\mathcal{P}(A\Delta B) \setminus \{\emptyset\} = \mathcal{P}(A) \Delta\mathcal{P}(B) $. Is my proof good?

Published on 16 Apr 2026 - 6:05

164

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bijective differentiable function with nondifferentiable inverse?

Published on 14 Apr 2026 - 23:09

142

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Prove gcd or disprove

Published on 16 Apr 2026 - 23:17

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How do you do this vector subspace question?

Published on 12 Apr 2026 - 4:13

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Tail behavior of series when means converge to zero.

Published on 15 Apr 2026 - 15:08

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counterexample of $\rho(AB) \leq \rho(A)\rho(B)$

Published on 12 Apr 2026 - 5:59

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Product homomorphism

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For odd $n$, if $x^2 = a \pmod{n}$ has a solution then at least one solution has a specific representation.

Published on 16 Apr 2026 - 15:13

125

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Self dual posets product

Published on 19 Apr 2026 - 17:24

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An example which shows that $F(f) \subset \overline{Per(f)} \subset L(f) \subset \Omega(f)$ is restrict?

Published on 15 Apr 2026 - 10:50

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Example of bijective function from $(-1,1)$ to $\Bbb R$

Published on 15 Apr 2026 - 7:18

List Question

Functor that does not preserve monic and epic

Specific family of functions?

Example of uniform but not normal convergence

Find a sequence of random variables

Disprove $\mathcal{P}(A\Delta B) \setminus \{\emptyset\} = \mathcal{P}(A) \Delta\mathcal{P}(B) $. Is my proof good?

bijective differentiable function with nondifferentiable inverse?

Prove gcd or disprove

How do you do this vector subspace question?

Tail behavior of series when means converge to zero.

counterexample of $\rho(AB) \leq \rho(A)\rho(B)$

Product homomorphism

For odd $n$, if $x^2 = a \pmod{n}$ has a solution then at least one solution has a specific representation.

Self dual posets product

An example which shows that $F(f) \subset \overline{Per(f)} \subset L(f) \subset \Omega(f)$ is restrict?

Example of bijective function from $(-1,1)$ to $\Bbb R$

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