Question

Counter-example to $\nabla^2 f =0 \implies \nabla \times \nabla f =\vec 0$?

score 60 · Answer 1 · 2026-03-29 08:15:13

60

Views

Counter-example to $\nabla^2 f =0 \implies \nabla \times \nabla f =\vec 0$?

Published on 29 Mar 2026 - 8:15

score 32 · Answer 2 · 2020-06-28 11:57:32

32

Views

How can I apply this easy derivative on this integral?

Published on 28 Jun 2020 - 11:57

score 889 · Answer 3 · 2026-03-30 07:11:23

889

Views

Gradient of complex-valued function with respect to real and imaginary components

Published on 30 Mar 2026 - 7:11

score 58 · Answer 4 · 2026-04-06 17:53:34

58

Views

Generalization of term by term differentiation theorem for function series

Published on 06 Apr 2026 - 17:53

score 27 · Answer 5 · 2020-06-30 13:27:43

27

Views

Deriving flux expression for endpoints of an interval for a one dimensional fluid

Published on 30 Jun 2020 - 13:27

score 478 · Answer 6 · 2020-07-01 10:30:13

478

Views

What is the actual difference between del and d in multivariate calculus?

Published on 01 Jul 2020 - 10:30

score 460 · Answer 7 · 2026-03-29 15:03:17

460

Views

What is a small change of a function with 2 variables?

Published on 29 Mar 2026 - 15:03

score 218 · Answer 8 · 2026-04-06 04:14:09

218

Views

Gradient in spherical coordinates.

Published on 06 Apr 2026 - 4:14

score 738 · Answer 9 · 2026-03-25 21:31:34

738

Views

A Frechét-differentiable function $:\to $ has a continuous derivative in $\in \iff$ all partial derivatives are continuous in $\in $.

Published on 25 Mar 2026 - 21:31

score 70 · Answer 10 · 2026-03-26 04:28:34

70

Views

A basic question on Lie derivative

Published on 26 Mar 2026 - 4:28

score 266 · Answer 11 · 2026-03-25 06:04:38

266

Views

In this textbook explanation of needing partial derivatives, how is this partial derivative not an indeterminate form?

Published on 25 Mar 2026 - 6:04

score 20 · Answer 12 · 2020-07-06 22:04:10

20

Views

Tangent planes that contains an intersection of two plans

Published on 06 Jul 2020 - 22:04

score 818 · Answer 13 · 2020-07-07 06:16:23

818

Views

How do I show that all directional derivative of $f$ exist at $(0,0)$, but $f$ is not differentiable at $(0,0)$.

Published on 07 Jul 2020 - 6:16

score 34 · Answer 14 · 2026-02-23 21:20:25

34

Views

How to differentiate $f(a(y),y)$ with respect to $y$?

Published on 23 Feb 2026 - 21:20

score 104 · Answer 15 · 2020-07-07 19:45:31

104

Views

correct use of Leibniz notation for the chain rule of a multivariable function.

Published on 07 Jul 2020 - 19:45

List Question

Counter-example to $\nabla^2 f =0 \implies \nabla \times \nabla f =\vec 0$?

How can I apply this easy derivative on this integral?

Gradient of complex-valued function with respect to real and imaginary components

Generalization of term by term differentiation theorem for function series

Deriving flux expression for endpoints of an interval for a one dimensional fluid

What is the actual difference between del and d in multivariate calculus?

What is a small change of a function with 2 variables?

Gradient in spherical coordinates.

A Frechét-differentiable function $:\to $ has a continuous derivative in $\in \iff$ all partial derivatives are continuous in $\in $.

A basic question on Lie derivative

In this textbook explanation of needing partial derivatives, how is this partial derivative not an indeterminate form?

Tangent planes that contains an intersection of two plans

How do I show that all directional derivative of $f$ exist at $(0,0)$, but $f$ is not differentiable at $(0,0)$.

How to differentiate $f(a(y),y)$ with respect to $y$?

correct use of Leibniz notation for the chain rule of a multivariable function.

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