Question

Equality of Mixed Partial Derivatives - Simple proof is Confusing

score 213 · Answer 1 · 2026-04-09 18:28:29

213

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Equality of Mixed Partial Derivatives - Simple proof is Confusing

Published on 09 Apr 2026 - 18:28

score 88 · Answer 2 · 2026-03-30 13:22:59

88

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$\iint_{S} F.\eta dA$ where $F = [3x^2 , y^2 , 0]$ and $S : r(u,v) = [u,v,2u+3v]$

Published on 30 Mar 2026 - 13:22

score 529 · Answer 3 · 2026-04-04 21:09:41

529

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Proving the differentiability of the following function of two variables

Published on 04 Apr 2026 - 21:09

score 165 · Answer 4 · 2026-04-09 18:23:46

165

Views

optimization with strict inequality of variables

Published on 09 Apr 2026 - 18:23

score 364 · Answer 5 · 2026-03-30 13:24:26

364

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How to find the unit tangent vector of a curve in R^3

Published on 30 Mar 2026 - 13:24

score 2k · Answer 6 · 2026-04-09 15:06:08

2k

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Prove all tangent plane to the cone $x^2+y^2=z^2$ goes through the origin

Published on 09 Apr 2026 - 15:06

score 1.6k · Answer 7 · 2026-04-03 15:25:17

1.6k

Views

Holding intermediate variables constant in partial derivative chain rule

Published on 03 Apr 2026 - 15:25

score 126 · Answer 8 · 2026-03-29 17:53:48

126

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Find the directional derivative in the point $p$ in the direction $\vec{pp'}$

Published on 29 Mar 2026 - 17:53

score 141 · Answer 9 · 2026-04-06 00:41:11

141

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Check if $\phi$ is convex

Published on 06 Apr 2026 - 0:41

score 64 · Answer 10 · 2026-04-07 11:56:04

64

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Define in which points function is continuous

Published on 07 Apr 2026 - 11:56

score 1.2k · Answer 11 · 2026-03-29 21:06:06

1.2k

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Gradient and Hessian of quadratic form

Published on 29 Mar 2026 - 21:06

score 351 · Answer 12 · 2026-04-02 03:55:50

351

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Can we call every set a topological space?

Published on 02 Apr 2026 - 3:55

score 28 · Answer 13 · 2026-04-02 04:42:58

28

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value of $f$ at a local minimum in the rectangular region $R : \{(x,y) \in \Bbb{R}^2 : |x| < 1.5 , |y|<1.5\}$?

Published on 02 Apr 2026 - 4:42

score 33 · Answer 14 · 2026-04-02 07:22:40

33

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Understanding the expression $f(a+tu)=f(a)+tD_uf(a)+o(t),t\rightarrow{0}$

Published on 02 Apr 2026 - 7:22

score 14.2k · Answer 15 · 2026-04-01 09:23:02

14.2k

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Find the equation of tangent line to the intersection of the two surfaces in $P(4,-2,20)$ $z=x^2+y^2 \,\,,\,z=2x+4y+20$

Published on 01 Apr 2026 - 9:23

List Question

Equality of Mixed Partial Derivatives - Simple proof is Confusing

$\iint_{S} F.\eta dA$ where $F = [3x^2 , y^2 , 0]$ and $S : r(u,v) = [u,v,2u+3v]$

Proving the differentiability of the following function of two variables

optimization with strict inequality of variables

How to find the unit tangent vector of a curve in R^3

Prove all tangent plane to the cone $x^2+y^2=z^2$ goes through the origin

Holding intermediate variables constant in partial derivative chain rule

Find the directional derivative in the point $p$ in the direction $\vec{pp'}$

Check if $\phi$ is convex

Define in which points function is continuous

Gradient and Hessian of quadratic form

Can we call every set a topological space?

value of $f$ at a local minimum in the rectangular region $R : \{(x,y) \in \Bbb{R}^2 : |x| < 1.5 , |y|<1.5\}$?

Understanding the expression $f(a+tu)=f(a)+tD_uf(a)+o(t),t\rightarrow{0}$

Find the equation of tangent line to the intersection of the two surfaces in $P(4,-2,20)$ $z=x^2+y^2 \,\,,\,z=2x+4y+20$

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