Question

Is strict-quasiconvexity equivalent to having a unique minimum in each convex set?

score 720 · Answer 1 · 2026-04-10 00:02:56

720

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Is strict-quasiconvexity equivalent to having a unique minimum in each convex set?

Published on 10 Apr 2026 - 0:02

score 108 · Answer 2 · 2026-04-09 03:01:27

108

Views

Convergence in norm equivalent formulations

Published on 09 Apr 2026 - 3:01

score 64 · Answer 3 · 2026-04-17 18:38:01

64

Views

Derivate of double integral

Published on 17 Apr 2026 - 18:38

score 304 · Answer 4 · 2026-04-17 04:27:57

304

Views

Prove $f$ has inverse $f^{-1}$ in a neighborhood of the point $(1,1)$

Published on 17 Apr 2026 - 4:27

score 628 · Answer 5 · 2026-03-26 12:26:55

628

Views

Let $f : \mathbb{R}^n\to \mathbb{R}^n$ be given by the equation $f(x) = ||x||^2·x$. Show that $f$ is of class $C^{\infty}$ and that $f$

Published on 26 Mar 2026 - 12:26

score 81 · Answer 6 · 2026-04-14 02:32:41

81

Views

Can $\max\{x\in X\}$ be written as $f(\sum_{x\in X}g(x))$ for some functions $f,g$.

Published on 14 Apr 2026 - 2:32

score 49 · Answer 7 · 2026-04-15 12:29:42

49

Views

For which value of $x \in R $ the following series converges $ \sum_{n=0}^\infty \frac {2x+n}{2+n^3x^2}$

Published on 15 Apr 2026 - 12:29

score 565 · Answer 8 · 2026-04-29 12:52:24

565

Views

Does it make mathematical sense to do an absolute convergence test if the original series diverges?

Published on 29 Apr 2026 - 12:52

score 62 · Answer 9 · 2026-04-13 20:38:12

62

Views

n vs. N in notation (proof writing)

Published on 13 Apr 2026 - 20:38

score 69 · Answer 10 · 2026-04-29 12:43:00

69

Views

Can anyone give me an example of a measurable subset of the interval [10,100], that is not a Borel set.

Published on 29 Apr 2026 - 12:43

score 44 · Answer 11 · 2026-04-08 05:58:33

44

Views

How we obtain this limit on an integral?

Published on 08 Apr 2026 - 5:58

score 35 · Answer 12 · 2026-04-16 18:59:19

35

Views

Find a way of computing $x_{20}$ accurately, perhaps by replacing the integrand by a truncated Taylor series. After computing $x_{20}$ to full

Published on 16 Apr 2026 - 18:59

score 28 · Answer 13 · 2026-04-14 03:06:10

28

Views

Question regarding bounded derivative

Published on 14 Apr 2026 - 3:06

score 407 · Answer 14 · 2026-04-29 12:44:15

407

Views

Change of variable and divergence

Published on 29 Apr 2026 - 12:44

score 124 · Answer 15 · 2026-04-13 11:34:31

124

Views

Pointwise maximum of uniform converging functions on compact sets

Published on 13 Apr 2026 - 11:34

List Question

Is strict-quasiconvexity equivalent to having a unique minimum in each convex set?

Convergence in norm equivalent formulations

Derivate of double integral

Prove $f$ has inverse $f^{-1}$ in a neighborhood of the point $(1,1)$

Let $f : \mathbb{R}^n\to \mathbb{R}^n$ be given by the equation $f(x) = ||x||^2·x$. Show that $f$ is of class $C^{\infty}$ and that $f$

Can $\max\{x\in X\}$ be written as $f(\sum_{x\in X}g(x))$ for some functions $f,g$.

For which value of $x \in R $ the following series converges $ \sum_{n=0}^\infty \frac {2x+n}{2+n^3x^2}$

Does it make mathematical sense to do an absolute convergence test if the original series diverges?

n vs. N in notation (proof writing)

Can anyone give me an example of a measurable subset of the interval [10,100], that is not a Borel set.

How we obtain this limit on an integral?

Find a way of computing $x_{20}$ accurately, perhaps by replacing the integrand by a truncated Taylor series. After computing $x_{20}$ to full

Question regarding bounded derivative

Change of variable and divergence

Pointwise maximum of uniform converging functions on compact sets

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