Question

Possible improvement on Giuga's conjecture - proof verification

score 111 · Answer 1 · 2026-04-09 23:26:28

111

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Possible improvement on Giuga's conjecture - proof verification

Published on 09 Apr 2026 - 23:26

score 318 · Answer 2 · 2026-04-22 12:42:12

318

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Measure of a circle is invariant under rotation

Published on 22 Apr 2026 - 12:42

score 95 · Answer 3 · 2026-04-10 16:49:53

95

Views

Constructive proof that every Cauchy sequence of reals converge

Published on 10 Apr 2026 - 16:49

score 53 · Answer 4 · 2026-04-15 03:22:31

53

Views

Prove that if $\bigcup\mathcal F\nsubseteq\bigcup\mathcal G$ then $\exists A\in\mathcal F\forall B\in\mathcal G(A \nsubseteq B)$.

Published on 15 Apr 2026 - 3:22

score 1k · Answer 5 · 2026-04-14 21:27:21

1k

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Show that $(\sum a_{n}^{3} \sin n)$ converges given $\sum{a_n}$ converges

Published on 14 Apr 2026 - 21:27

score 140 · Answer 6 · 2026-04-13 13:14:17

140

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Proof by contradiction (2 ways of writing it)

Published on 13 Apr 2026 - 13:14

score 118 · Answer 7 · 2026-04-15 14:58:59

118

Views

Proof completion: Finding the length of period for $q$-nary irreducible fraction $m / n$ with $q$, $n$ coprime

Published on 15 Apr 2026 - 14:58

score 45 · Answer 8 · 2026-03-26 11:04:16

45

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Sanity check: is this simple formula for pseudoinverse of $[\mathbf{U} \cdots \mathbf{U}]$ correct?

Published on 26 Mar 2026 - 11:04

score 33 · Answer 9 · 2026-04-16 07:09:31

33

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Show that there exists a unique measure $\pi$ on $\mathcal{B}[0,\infty)\otimes\mathcal{P}(\mathbb{N})$

Published on 16 Apr 2026 - 7:09

score 143 · Answer 10 · 2026-04-13 14:35:44

143

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The neighborhood $U$ of the identity generates a connected Lie group $G$. Proof check.

Published on 13 Apr 2026 - 14:35

score 300 · Answer 11 · 2026-04-12 17:48:21

300

Views

Let $X,Y$ be banach spaces $T,T_n: X\to Y$ and let $T_n \to T$ pointwise, show $T_n \to T$ uniformly on all compact sets

Published on 12 Apr 2026 - 17:48

score 353 · Answer 12 · 2026-04-09 14:36:04

353

Views

General solution to eigenvalue problem when $\lambda $ is negative.

Published on 09 Apr 2026 - 14:36

score 754 · Answer 13 · 2026-03-26 07:55:33

754

Views

Evans' PDE exercise 6.3

Published on 26 Mar 2026 - 7:55

score 4.3k · Answer 14 · 2026-04-15 01:38:55

4.3k

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Prove that four vectors of the three dimensional Euclidean space are always linearly dependant.

Published on 15 Apr 2026 - 1:38

score 328 · Answer 15 · 2026-03-25 19:02:06

328

Views

Local maximum and critical points smooth manifolds surjectivity

Published on 25 Mar 2026 - 19:02

List Question

Possible improvement on Giuga's conjecture - proof verification

Measure of a circle is invariant under rotation

Constructive proof that every Cauchy sequence of reals converge

Prove that if $\bigcup\mathcal F\nsubseteq\bigcup\mathcal G$ then $\exists A\in\mathcal F\forall B\in\mathcal G(A \nsubseteq B)$.

Show that $(\sum a_{n}^{3} \sin n)$ converges given $\sum{a_n}$ converges

Proof by contradiction (2 ways of writing it)

Proof completion: Finding the length of period for $q$-nary irreducible fraction $m / n$ with $q$, $n$ coprime

Sanity check: is this simple formula for pseudoinverse of $[\mathbf{U} \cdots \mathbf{U}]$ correct?

Show that there exists a unique measure $\pi$ on $\mathcal{B}[0,\infty)\otimes\mathcal{P}(\mathbb{N})$

The neighborhood $U$ of the identity generates a connected Lie group $G$. Proof check.

Let $X,Y$ be banach spaces $T,T_n: X\to Y$ and let $T_n \to T$ pointwise, show $T_n \to T$ uniformly on all compact sets

General solution to eigenvalue problem when $\lambda $ is negative.

Evans' PDE exercise 6.3

Prove that four vectors of the three dimensional Euclidean space are always linearly dependant.

Local maximum and critical points smooth manifolds surjectivity

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