List questions from examples-counterexamples

Published on 10 Apr 2026 - 19:42

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Conjecture: When does $n=ab$, with $a\leq b\leq 2a$?

Published on 13 Apr 2026 - 0:00

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Discrete Math Questions? (checking my answers)

Published on 16 Apr 2026 - 9:03

287

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How many massively palindromic primes exist?

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Is there a counterexample to this metric analog of the side-angle-side (SAS) postulate?

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The "true" domain of random variables

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Counter Example: If |f| is Riemann integrable, then f is not necessarily integrable

Published on 14 Apr 2026 - 10:16

39

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Examples: PDE with slow decay

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34

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Example that $[X,Y]$ is not complete

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Strange consequences of Axiom of Choice in Zermelo set theory

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When is proof by well-ordering preferable to proof by induction?

Published on 27 Mar 2026 - 2:38

998

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What does adding two inequalities represent?

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Counter example

Published on 11 Apr 2026 - 2:20

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Sylow system of a group

Published on 13 Apr 2026 - 0:14

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Example of map from commutative ring to another commutative that preserves multiplicative identity and addition but NOT multiplication.

Published on 14 Apr 2026 - 13:00

List Question

Counterexample for the Chain rule for the Gateaux-derivative

Conjecture: When does $n=ab$, with $a\leq b\leq 2a$?

Discrete Math Questions? (checking my answers)

How many massively palindromic primes exist?

Is there a counterexample to this metric analog of the side-angle-side (SAS) postulate?

The "true" domain of random variables

Counter Example: If |f| is Riemann integrable, then f is not necessarily integrable

Examples: PDE with slow decay

Example that $[X,Y]$ is not complete

Strange consequences of Axiom of Choice in Zermelo set theory

When is proof by well-ordering preferable to proof by induction?

What does adding two inequalities represent?

Counter example

Sylow system of a group

Example of map from commutative ring to another commutative that preserves multiplicative identity and addition but NOT multiplication.

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