Question

Characterization of convexity with a gradient formula almost everywhere

score 285 · Answer 1 · 2026-02-26 12:36:29

285

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Characterization of convexity with a gradient formula almost everywhere

Published on 26 Feb 2026 - 12:36

score 126 · Answer 2 · 2026-04-11 19:33:56

126

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Show that $S$ is a convex set, if it is locally convex everywhere

Published on 11 Apr 2026 - 19:33

score 45 · Answer 3 · 2026-04-09 15:20:44

45

Views

convex envelope in integral form

Published on 09 Apr 2026 - 15:20

score 94 · Answer 4 · 2026-04-11 11:53:53

94

Views

Inequalities for convex functions

Published on 11 Apr 2026 - 11:53

score 277 · Answer 5 · 2026-03-26 17:36:17

277

Views

Is $g(x_1, x_2) = |\alpha - x_1| + |\max \{\alpha, x_1\} + \beta - x_2|$ convex?

Published on 26 Mar 2026 - 17:36

score 276 · Answer 6 · 2026-04-11 04:10:30

276

Views

When is the product of two functions concave?

Published on 11 Apr 2026 - 4:10

score 33 · Answer 7 · 2019-11-26 17:09:31

33

Views

Rockafellar theorem 7.4 - Agreement of cl f with f within the relative interior of dom f

Published on 26 Nov 2019 - 17:09

score 76 · Answer 8 · 2019-11-27 09:59:32

76

Views

Prove that a $\mathbb R^2$ function is convex

Published on 27 Nov 2019 - 9:59

score 41 · Answer 9 · 2019-11-28 13:41:51

41

Views

$\forall x,y\in\partial S$, the line connecting $\{x,y\}$, $L\{x,y\}\cap\partial S=\{x,y\}$, then $S$ must be either convex or concave?

Published on 28 Nov 2019 - 13:41

score 32 · Answer 10 · 2019-11-28 15:47:35

32

Views

Is this set $\{(x\overline{y},|x|^2)\,;\;(x,y)\in \mathbb{C}^2,\;|y|=1\}$ convex?

Published on 28 Nov 2019 - 15:47

score 58 · Answer 11 · 2019-11-28 22:21:03

58

Views

Is majorization a total order on finite non-negative integers of fixed length?

Published on 28 Nov 2019 - 22:21

score 73 · Answer 12 · 2026-04-11 10:01:38

73

Views

convexity of infimum over 1 variable, constraint

Published on 11 Apr 2026 - 10:01

score 92 · Answer 13 · 2026-04-11 18:09:50

92

Views

Why is relative interior point not equivalent to interior point under the following definition?

Published on 11 Apr 2026 - 18:09

score 299 · Answer 14 · 2019-11-30 18:48:43

299

Views

A property of Legendre transform, Chapter 3, Problem 12, Evans PDE

Published on 30 Nov 2019 - 18:48

score 33 · Answer 15 · 2019-12-01 18:38:51

33

Views

If $\log g(x)$ ‎is ‎concave, then it has derivative ‎$ ‎\frac{g^‎\prime_{-}(x) + g^‎\prime_{+}(x) ‎}{2g(x)}‎$ ‎except.

Published on 01 Dec 2019 - 18:38

List Question

Characterization of convexity with a gradient formula almost everywhere

Show that $S$ is a convex set, if it is locally convex everywhere

convex envelope in integral form

Inequalities for convex functions

Is $g(x_1, x_2) = |\alpha - x_1| + |\max \{\alpha, x_1\} + \beta - x_2|$ convex?

When is the product of two functions concave?

Rockafellar theorem 7.4 - Agreement of cl f with f within the relative interior of dom f

Prove that a $\mathbb R^2$ function is convex

$\forall x,y\in\partial S$, the line connecting $\{x,y\}$, $L\{x,y\}\cap\partial S=\{x,y\}$, then $S$ must be either convex or concave?

Is this set $\{(x\overline{y},|x|^2)\,;\;(x,y)\in \mathbb{C}^2,\;|y|=1\}$ convex?

Is majorization a total order on finite non-negative integers of fixed length?

convexity of infimum over 1 variable, constraint

Why is relative interior point not equivalent to interior point under the following definition?

A property of Legendre transform, Chapter 3, Problem 12, Evans PDE

If $\log g(x)$ ‎is ‎concave, then it has derivative ‎$ ‎\frac{g^‎\prime_{-}(x) + g^‎\prime_{+}(x) ‎}{2g(x)}‎$ ‎except.

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