List questions from proof-explanation

Published on 16 Apr 2026 - 13:24

72

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Trouble understanding stated consequence of the division theorem

Published on 14 Apr 2026 - 2:25

503

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How to deduce the conditions for using the final value theorem from the proof itself?

Published on 10 Apr 2026 - 3:00

1.3k

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Finding Variance of the Hypergeometric distribution

Published on 13 Apr 2026 - 22:31

732

Views

Rewriting the time-independent Schrödinger equation for a simple harmonic oscillating potential in terms of new variables

Published on 10 Apr 2026 - 21:40

4.7k

Views

Uniqueness proof of the left-inverse of a function

Published on 14 Apr 2026 - 10:57

134

Views

One problem in theorem $2$ from "Some further results in Ideal Convergence in Topological Spaces" by P. Das

Published on 11 Apr 2026 - 3:32

28

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Proving ${l/2}b_n<a_n<(3l/2)b_n$ when $a_n/b_n \rightarrow l$ as $n \rightarrow \infty$

Published on 16 Apr 2026 - 2:52

407

Views

Prove that any subgroup of a free Abelian group of rank $r$ is free Abelian of rank at most $r$.

Published on 10 May 2026 - 18:30

255

Views

A very basic (I think) question about proofs and infinitely many primes.

Published on 12 Apr 2026 - 0:41

37

Views

For a subadditive function , how can $\lim_n A_i=\lim_n (\bigcup_j A_j)$ hold?

Published on 14 Apr 2026 - 21:49

175

Views

Proving the $\lim_\limits{x\to2}\,\, 2x^2-6x+7=3$.

Published on 06 May 2026 - 21:49

2.1k

Views

Proof using smallest counter example

Published on 10 Apr 2026 - 23:55

62

Views

Proving that $f(\{x\})=\{f(x)\}$ for all $x\in X$

Published on 15 Apr 2026 - 18:15

3.6k

Views

Prove given A and B ∈ n(ℝ) , and A and B are symmetric then AB is symmetric

Published on 16 Apr 2026 - 12:05

List Question

Is this a good parity proof?

Trouble understanding stated consequence of the division theorem

How to deduce the conditions for using the final value theorem from the proof itself?

Finding Variance of the Hypergeometric distribution

Rewriting the time-independent Schrödinger equation for a simple harmonic oscillating potential in terms of new variables

Uniqueness proof of the left-inverse of a function

One problem in theorem $2$ from "Some further results in Ideal Convergence in Topological Spaces" by P. Das

Proving ${l/2}b_n<a_n<(3l/2)b_n$ when $a_n/b_n \rightarrow l$ as $n \rightarrow \infty$

Prove that any subgroup of a free Abelian group of rank $r$ is free Abelian of rank at most $r$.

A very basic (I think) question about proofs and infinitely many primes.

For a subadditive function , how can $\lim_n A_i=\lim_n (\bigcup_j A_j)$ hold?

Proving the $\lim_\limits{x\to2}\,\, 2x^2-6x+7=3$.

Proof using smallest counter example

Proving that $f(\{x\})=\{f(x)\}$ for all $x\in X$

Prove given A and B ∈ n(ℝ) , and A and B are symmetric then AB is symmetric

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