Question

boundary of zero level set (free boundary) of a p-harmonic function

score 25 · Answer 1 · 2026-03-27 04:34:16

25

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boundary of zero level set (free boundary) of a p-harmonic function

Published on 27 Mar 2026 - 4:34

score 93 · Answer 2 · 2019-08-30 20:58:20

93

Views

Understanding proof of continuity of partial derivative

Published on 30 Aug 2019 - 20:58

score 68 · Answer 3 · 2019-08-31 07:02:07

68

Views

Showing $\sum_{i=1}^{n}\frac{\partial^2 v}{\partial x_i^2}=\frac{\partial^2v}{\partial r^2}+\frac{n-1}{r}\frac{\partial v}{\partial r}$

Published on 31 Aug 2019 - 7:02

score 160 · Answer 4 · 2019-08-31 15:25:45

160

Views

Evaluate: $\left(\frac{\partial }{\partial x}+\frac{\partial }{\partial y}+\frac{\partial }{\partial z}\right)^2u$

Published on 31 Aug 2019 - 15:25

score 103 · Answer 5 · 2026-03-27 20:21:05

103

Views

Show that $C_1(1+||x||^2)^k \leq \sum_{|\alpha| \leq k} x^{2\alpha} \leq C_2 (1+||x||^2)^k$

Published on 27 Mar 2026 - 20:21

score 58 · Answer 6 · 2019-09-01 19:42:38

58

Views

Passing a derivative through a function

Published on 01 Sep 2019 - 19:42

score 44 · Answer 7 · 2019-09-02 08:18:42

44

Views

Derivation of a second order PDE

Published on 02 Sep 2019 - 8:18

score 106 · Answer 8 · 2019-09-02 16:33:54

106

Views

How can solve this wave equation?

Published on 02 Sep 2019 - 16:33

score 236 · Answer 9 · 2019-09-03 04:07:58

236

Views

Partial derivative with unknown function f(x,y)

Published on 03 Sep 2019 - 4:07

score 126 · Answer 10 · 2026-03-29 21:29:45

126

Views

Converting differential equation $U_{xx} - U_{yy} = 0$ to polar coordinates

Published on 29 Mar 2026 - 21:29

score 1.1k · Answer 11 · 2026-03-29 03:11:01

1.1k

Views

We have a function which takes a two-dimensional input and has two parameters. How to find (∂/∂(_2))

Published on 29 Mar 2026 - 3:11

score 170 · Answer 12 · 2019-09-05 20:01:39

170

Views

How is it that this partial derivative is equal to 0?

Published on 05 Sep 2019 - 20:01

score 24 · Answer 13 · 2019-09-06 17:55:07

24

Views

let $f(x,y)= \frac{x^2|x|^{\beta}y}{x^4+y^2}$ when $x\neq0$ . we have to show that $f $ is continuous at $(0,0)$ for $\beta >0$

Published on 06 Sep 2019 - 17:55

score 126 · Answer 14 · 2019-09-07 21:52:16

126

Views

Satisfying first and second order PDEs given any two smooth functions

Published on 07 Sep 2019 - 21:52

score 91 · Answer 15 · 2019-09-08 18:15:16

91

Views

Trying to construct a function where partial derivatives are these particular functions. Am I correct?

Published on 08 Sep 2019 - 18:15

List Question

boundary of zero level set (free boundary) of a p-harmonic function

Understanding proof of continuity of partial derivative

Showing $\sum_{i=1}^{n}\frac{\partial^2 v}{\partial x_i^2}=\frac{\partial^2v}{\partial r^2}+\frac{n-1}{r}\frac{\partial v}{\partial r}$

Evaluate: $\left(\frac{\partial }{\partial x}+\frac{\partial }{\partial y}+\frac{\partial }{\partial z}\right)^2u$

Show that $C_1(1+||x||^2)^k \leq \sum_{|\alpha| \leq k} x^{2\alpha} \leq C_2 (1+||x||^2)^k$

Passing a derivative through a function

Derivation of a second order PDE

How can solve this wave equation?

Partial derivative with unknown function f(x,y)

Converting differential equation $U_{xx} - U_{yy} = 0$ to polar coordinates

We have a function which takes a two-dimensional input and has two parameters. How to find (∂/∂(_2))

How is it that this partial derivative is equal to 0?

let $f(x,y)= \frac{x^2|x|^{\beta}y}{x^4+y^2}$ when $x\neq0$ . we have to show that $f $ is continuous at $(0,0)$ for $\beta >0$

Satisfying first and second order PDEs given any two smooth functions

Trying to construct a function where partial derivatives are these particular functions. Am I correct?

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