List questions from examples-counterexamples

Published on 16 Apr 2026 - 7:36

163

Views

A non-entire function whose square and composition of itself are polynomials.

Published on 13 Apr 2026 - 6:03

43

Views

Calculating a limit around a differentiable point

Published on 14 Apr 2026 - 14:39

80

Views

$(A \to B) \to (\lnot A \lor B)$ intutionistically valid?

Published on 14 Apr 2026 - 6:21

310

Views

Find a property of groups that is inherited by quotients but not by subgroups.

Published on 14 Apr 2026 - 15:20

69

Views

A question on weak convergence

Published on 16 Apr 2026 - 20:35

137

Views

Find a property of groups that is inherited by subgroups but not by quotients.

Published on 15 Apr 2026 - 11:15

150

Views

Can there be any representation of a finite group which is reducible but indecomposable?

Published on 11 Apr 2026 - 22:43

92

Views

Counterexample to problem regarding Hall $\pi$-subgroups of a quotient group

Published on 10 Apr 2026 - 20:56

38

Views

How to evaluate the formula $\lnot(A\land B) \lor \lozenge A$ to true in modal logic?

Published on 10 Apr 2026 - 21:17

45

Views

Examples: Sequence of derivatives $\lim_{n\to\infty}f_n'(x)\neq \left(\lim_{n\to\infty}f_n(x)\right)'$

Published on 16 Apr 2026 - 16:18

384

Views

Counterexample regarding basic properties of limits

Published on 13 Apr 2026 - 11:14

59

Views

Question about squeeze and toast rule in limits

Published on 12 Apr 2026 - 13:22

74

Views

Wrong way of using the squeeze rule

Published on 08 Apr 2026 - 20:25

55

Views

How is $\mathbb C(x)^*$ a free group?

Published on 16 Apr 2026 - 8:08

List Question

Prove that if $f \circ g$ is one-to-one, then $g$ if one-to-one

A non-entire function whose square and composition of itself are polynomials.

Calculating a limit around a differentiable point

$(A \to B) \to (\lnot A \lor B)$ intutionistically valid?

Find a property of groups that is inherited by quotients but not by subgroups.

A question on weak convergence

Find a property of groups that is inherited by subgroups but not by quotients.

Can there be any representation of a finite group which is reducible but indecomposable?

Counterexample to problem regarding Hall $\pi$-subgroups of a quotient group

How to evaluate the formula $\lnot(A\land B) \lor \lozenge A$ to true in modal logic?

Examples: Sequence of derivatives $\lim_{n\to\infty}f_n'(x)\neq \left(\lim_{n\to\infty}f_n(x)\right)'$

Counterexample regarding basic properties of limits

Question about squeeze and toast rule in limits

Wrong way of using the squeeze rule

How is $\mathbb C(x)^*$ a free group?

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