Question

Example of a function $f(x,t)$ such that $t \to \int f(x,t) dx$ and $\int f(x,t) dxdt$ finite, BUT $\int \lvert f(x,t) \rvert dxdt =\infty$?

score 62 · Answer 1 · 2023-11-28 12:54:53

62

Views

Example of a function $f(x,t)$ such that $t \to \int f(x,t) dx$ and $\int f(x,t) dxdt$ finite, BUT $\int \lvert f(x,t) \rvert dxdt =\infty$?

Published on 28 Nov 2023 - 12:54

score 62 · Answer 2 · 2023-11-28 19:37:17

62

Views

Continuous and increasing in every variable does not imply continuous?

Published on 28 Nov 2023 - 19:37

score 29 · Answer 3 · 2023-12-02 15:39:59

29

Views

Is the product of totally closed collections totally closed too?

Published on 02 Dec 2023 - 15:39

score 74 · Answer 4 · 2026-04-01 08:26:09

74

Views

Definition of smooth action

Published on 01 Apr 2026 - 8:26

score 117 · Answer 5 · 2026-04-02 08:21:16

117

Views

Factorial equation and no solution existing :A conjecture

Published on 02 Apr 2026 - 8:21

score 78 · Answer 6 · 2023-12-04 21:54:57

78

Views

If $g(t,x) \rightarrow 0$ as $x \rightarrow \infty$, then decays uniformly in $t$?

Published on 04 Dec 2023 - 21:54

score 40 · Answer 7 · 2026-04-06 19:35:31

40

Views

Does the equality $\bigcup S(X)=X$ holds for any set $X$?

Published on 06 Apr 2026 - 19:35

score 114 · Answer 8 · 2026-03-29 13:47:23

114

Views

How are submodules characterized with respect to the isomorphism of the direct sum of multiple modules?

Published on 29 Mar 2026 - 13:47

score 3.7k · Answer 9 · 2023-12-06 16:46:12

3.7k

Views

Is there an injective function $f:\mathbb{R}^2\rightarrow\mathbb{R}^2$ that maps circles to $n$-gons?

Published on 06 Dec 2023 - 16:46

score 202 · Answer 10 · 2023-12-07 15:07:04

202

Views

Looking for a couple of sequence satisfying some conditions

Published on 07 Dec 2023 - 15:07

score 129 · Answer 11 · 2026-03-26 02:53:56

129

Views

The Diophantine equation $A^{15} + B^5 + C^5 + D^5 = E^{10}$

Published on 26 Mar 2026 - 2:53

score 20 · Answer 12 · 2026-04-07 02:06:42

20

Views

Can someone give example(s) of projective non-singular algebraic varieties over $\mathbb{C}$?

Published on 07 Apr 2026 - 2:06

score 410 · Answer 13 · 2023-12-08 19:41:08

410

Views

Example of a uncountable compact metric space with countably infinitely many isometries

Published on 08 Dec 2023 - 19:41

score 151 · Answer 14 · 2026-03-28 11:33:28

151

Views

The Diophantine equation $P_1^3 + P_2^3 + P_3^3 = P_4^3$

Published on 28 Mar 2026 - 11:33

score 42 · Answer 15 · 2026-03-27 05:37:38

42

Views

Newton's method when $f'(\overline{X}) = 0$

Published on 27 Mar 2026 - 5:37

List Question

Example of a function $f(x,t)$ such that $t \to \int f(x,t) dx$ and $\int f(x,t) dxdt$ finite, BUT $\int \lvert f(x,t) \rvert dxdt =\infty$?

Continuous and increasing in every variable does not imply continuous?

Is the product of totally closed collections totally closed too?

Definition of smooth action

Factorial equation and no solution existing :A conjecture

If $g(t,x) \rightarrow 0$ as $x \rightarrow \infty$, then decays uniformly in $t$?

Does the equality $\bigcup S(X)=X$ holds for any set $X$?

How are submodules characterized with respect to the isomorphism of the direct sum of multiple modules?

Is there an injective function $f:\mathbb{R}^2\rightarrow\mathbb{R}^2$ that maps circles to $n$-gons?

Looking for a couple of sequence satisfying some conditions

The Diophantine equation $A^{15} + B^5 + C^5 + D^5 = E^{10}$

Can someone give example(s) of projective non-singular algebraic varieties over $\mathbb{C}$?

Example of a uncountable compact metric space with countably infinitely many isometries

The Diophantine equation $P_1^3 + P_2^3 + P_3^3 = P_4^3$

Newton's method when $f'(\overline{X}) = 0$

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