List questions from solution-verification

Published on 08 May 2020 - 3:25

176

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Are the two groups $\mathbb R$ and $\mathbb C$ isomorphic?

Published on 01 Apr 2026 - 10:21

165

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Prove that $\lim\limits_{n \to \infty}\frac{a_1b_1+\cdots+a_nb_n}{b_1+b_2+\cdots+b_n}=a$

Published on 08 May 2020 - 5:32

74

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Comparing a binomial coefficient to a fraction of factorials

Published on 08 Apr 2026 - 23:39

62

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Why can you compute $\dfrac{d}{dx}{x^x} $ by holding constant the base + exponent?

Published on 08 May 2020 - 6:40

22

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Clarification on a Graph Theory proof

Published on 08 May 2020 - 9:54

270

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Permutation matrix times its transposed matrix is equal to Identity Matrix - Proof

Published on 12 Apr 2026 - 4:23

61

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I don't know if I'm correct.

Published on 03 Apr 2026 - 22:58

48

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Closure of boundary a boundary of closure.

Published on 12 Apr 2026 - 13:41

60

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Are theorems in a mathematical theory effectively checkable?

Published on 09 Apr 2026 - 4:10

282

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$\lim\limits_{x\to \infty} f'(x)=1$ implies $f:\mathbb {R\to R}$ is unbounded.

Published on 03 Apr 2026 - 3:21

169

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Is this a correct proof of $\overline{A\cup B}=\overline{A}\cup\overline{B}$

Published on 08 May 2020 - 14:53

56

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Computing Conditional Density Functions and Expectations

Published on 02 Apr 2026 - 18:25

26

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Question regarding limits of rational powers of functions

Published on 10 Apr 2026 - 7:34

79

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Limit of a shifted sequence is the same limit of the non shifted sequence

Published on 08 May 2020 - 17:36

List Question

Prove that if A and B are denumerable disjoint sets, then $A∪B$ is denumerable.

Are the two groups $\mathbb R$ and $\mathbb C$ isomorphic?

Prove that $\lim\limits_{n \to \infty}\frac{a_1b_1+\cdots+a_nb_n}{b_1+b_2+\cdots+b_n}=a$

Comparing a binomial coefficient to a fraction of factorials

Why can you compute $\dfrac{d}{dx}{x^x} $ by holding constant the base + exponent?

Clarification on a Graph Theory proof

Permutation matrix times its transposed matrix is equal to Identity Matrix - Proof

I don't know if I'm correct.

Closure of boundary a boundary of closure.

Are theorems in a mathematical theory effectively checkable?

$\lim\limits_{x\to \infty} f'(x)=1$ implies $f:\mathbb {R\to R}$ is unbounded.

Is this a correct proof of $\overline{A\cup B}=\overline{A}\cup\overline{B}$

Computing Conditional Density Functions and Expectations

Question regarding limits of rational powers of functions

Limit of a shifted sequence is the same limit of the non shifted sequence

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