Question

Second partial derivative: What happens if $f_{xy}^2$ is larger than $f_{xx} f_{yy}$

score 195 · Answer 1 · 2026-04-17 14:44:45

195

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Second partial derivative: What happens if $f_{xy}^2$ is larger than $f_{xx} f_{yy}$

Published on 17 Apr 2026 - 14:44

score 91 · Answer 2 · 2026-04-14 00:29:44

91

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Prove that $\Delta u=F$ with these conditions has at most one solution

Published on 14 Apr 2026 - 0:29

score 102 · Answer 3 · 2026-04-16 21:13:59

102

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Show that the absolute maximum of $f(x, y) = \frac{(ax+by+c)^2}{x^2+y^2+1}$ is $a^2 + b^2 + c^2$

Published on 16 Apr 2026 - 21:13

score 112 · Answer 4 · 2026-04-10 09:16:43

112

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Min-max principle for eigenvalues in 1d elliptic problem

Published on 10 Apr 2026 - 9:16

score 102 · Answer 5 · 2026-04-14 01:09:09

102

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Economics | A & B negotiating sale of asset. B owns asset but has no value, A know value, B knows probability. Find optimal offer.

Published on 14 Apr 2026 - 1:09

score 224 · Answer 6 · 2026-04-15 22:47:16

224

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What is maximum value of $f(t)=16\cos t \cdot \cos 2t \cdot\cos 3t \cdot \cos6t$

Published on 15 Apr 2026 - 22:47

score 123 · Answer 7 · 2026-04-14 12:36:29

123

Views

Maximal Probability inequality

Published on 14 Apr 2026 - 12:36

score 96 · Answer 8 · 2026-04-15 05:45:35

96

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Local maximum of the function $F(x)/F'(0)$

Published on 15 Apr 2026 - 5:45

score 82 · Answer 9 · 2026-04-16 15:21:56

82

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Which is the best way to find max and min of this function: $f(x,y)=\frac{x^6+y^4}{x^3+xy^2}$?

Published on 16 Apr 2026 - 15:21

score 23 · Answer 10 · 2026-04-11 20:57:32

23

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Continuous, non-osciallating functions must be decreasing close to unique global minimum?

Published on 11 Apr 2026 - 20:57

score 71 · Answer 11 · 2026-04-12 03:02:49

71

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Finding the minimum of a function

Published on 12 Apr 2026 - 3:02

score 227 · Answer 12 · 2026-04-15 13:13:55

When $a^2 + b^2 + c^2 + d^2 = 1$ and the expression $(a - b)(b - c)(c - d)(d - a)$ reaches its minimum value, determine the value of product $abcd$.

score 473 · Answer 13 · 2026-04-12 00:13:05

473

Views

Maximum of the sum of two functions with different variables

Published on 12 Apr 2026 - 0:13

score 190 · Answer 14 · 2026-04-10 11:57:13

190

Views

Global Minimizer.

Published on 10 Apr 2026 - 11:57

score 45 · Answer 15 · 2026-04-16 21:51:19

45

Views

Bounded maxima for $3\sqrt{xy}$ on $x^2y+y^2+x=3$

Published on 16 Apr 2026 - 21:51

List Question

Second partial derivative: What happens if $f_{xy}^2$ is larger than $f_{xx} f_{yy}$

Prove that $\Delta u=F$ with these conditions has at most one solution

Show that the absolute maximum of $f(x, y) = \frac{(ax+by+c)^2}{x^2+y^2+1}$ is $a^2 + b^2 + c^2$

Min-max principle for eigenvalues in 1d elliptic problem

Economics | A & B negotiating sale of asset. B owns asset but has no value, A know value, B knows probability. Find optimal offer.

What is maximum value of $f(t)=16\cos t \cdot \cos 2t \cdot\cos 3t \cdot \cos6t$

Maximal Probability inequality

Local maximum of the function $F(x)/F'(0)$

Which is the best way to find max and min of this function: $f(x,y)=\frac{x^6+y^4}{x^3+xy^2}$?

Continuous, non-osciallating functions must be decreasing close to unique global minimum?

Finding the minimum of a function

When $a^2 + b^2 + c^2 + d^2 = 1$ and the expression $(a - b)(b - c)(c - d)(d - a)$ reaches its minimum value, determine the value of product $abcd$.

Maximum of the sum of two functions with different variables

Global Minimizer.

Bounded maxima for $3\sqrt{xy}$ on $x^2y+y^2+x=3$

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