Question

$X$ is $T_1$ if and only if every finite subset of $X$ is closed

score 80 · Answer 1 · 2026-04-16 15:31:31

80

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$X$ is $T_1$ if and only if every finite subset of $X$ is closed

Published on 16 Apr 2026 - 15:31

score 60 · Answer 2 · 2026-04-12 08:17:14

60

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Not sure when to use Distributive Law in specific Proofs question.

Published on 12 Apr 2026 - 8:17

score 80 · Answer 3 · 2026-05-10 20:52:33

80

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Is this a new visual for finding the genralized Sum of Positive Integer Powers formulas?

Published on 10 May 2026 - 20:52

score 1.4k · Answer 4 · 2026-04-16 11:29:57

1.4k

Views

Show that every order topology is regular

Published on 16 Apr 2026 - 11:29

score 387 · Answer 5 · 2026-05-10 20:53:26

387

Views

Show that the characters of the representations $\phi_{n}$ of $SU(2)$ constitute a complete orthogonal set.

Published on 10 May 2026 - 20:53

score 179 · Answer 6 · 2026-04-11 04:54:46

179

Views

How do you prove this using mathematical induction

Published on 11 Apr 2026 - 4:54

score 305 · Answer 7 · 2026-04-08 18:15:52

305

Views

The proof of Frobenius Formula in Fulton and Harris "representation theory a first course" .

Published on 08 Apr 2026 - 18:15

score 280 · Answer 8 · 2026-04-15 18:37:21

280

Views

Evaluate $\lim_{(x,y) \to (0,0), x+y \neq 0}{\frac{\ln(1-x-y)}{x+y} } $

Published on 15 Apr 2026 - 18:37

score 483 · Answer 9 · 2026-04-09 07:49:09

483

Views

Convolution of bounded Lipschitz function with heat kernel solves the heat equation

Published on 09 Apr 2026 - 7:49

score 434 · Answer 10 · 2026-04-14 01:31:09

434

Views

Proving Extreme Value Theorem (Minimum Value)

Published on 14 Apr 2026 - 1:31

score 149 · Answer 11 · 2026-04-11 18:48:10

149

Views

Using Induction to prove sequence inequality

Published on 11 Apr 2026 - 18:48

score 3.1k · Answer 12 · 2026-04-17 07:00:16

3.1k

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Let $f, g : X \rightarrow Y$ be continuous; assume $Y$ is Hausdorff. Show that $\{x \mid f(x) = g(x)\}$ is closed in $X$

Published on 17 Apr 2026 - 7:00

score 455 · Answer 13 · 2026-04-16 08:38:30

455

Views

Prove that if B−C ⊆ $A^c$ then A∩B⊆C

Published on 16 Apr 2026 - 8:38

score 182 · Answer 14 · 2026-04-16 14:34:58

182

Views

Calculate $\oint_{\gamma} \tanh(z) dz$ on the curve $|z - \frac {\pi}{4}i|=\frac 12$

Published on 16 Apr 2026 - 14:34

score 772 · Answer 15 · 2026-04-14 22:42:44

772

Views

Proof that Good Kernels are Approximations of Identity in $L^p(\mathbb R^d)$

Published on 14 Apr 2026 - 22:42

List Question

$X$ is $T_1$ if and only if every finite subset of $X$ is closed

Not sure when to use Distributive Law in specific Proofs question.

Is this a new visual for finding the genralized Sum of Positive Integer Powers formulas?

Show that every order topology is regular

Show that the characters of the representations $\phi_{n}$ of $SU(2)$ constitute a complete orthogonal set.

How do you prove this using mathematical induction

The proof of Frobenius Formula in Fulton and Harris "representation theory a first course" .

Evaluate $\lim_{(x,y) \to (0,0), x+y \neq 0}{\frac{\ln(1-x-y)}{x+y} } $

Convolution of bounded Lipschitz function with heat kernel solves the heat equation

Proving Extreme Value Theorem (Minimum Value)

Using Induction to prove sequence inequality

Let $f, g : X \rightarrow Y$ be continuous; assume $Y$ is Hausdorff. Show that $\{x \mid f(x) = g(x)\}$ is closed in $X$

Prove that if B−C ⊆ $A^c$ then A∩B⊆C

Calculate $\oint_{\gamma} \tanh(z) dz$ on the curve $|z - \frac {\pi}{4}i|=\frac 12$

Proof that Good Kernels are Approximations of Identity in $L^p(\mathbb R^d)$

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