Question

If $u$ is real valued function on $\Omega \subset \Bbb R^n$ then what is meant by $D^{\alpha} u$?

score 35 · Answer 1 · 2026-04-14 19:21:38

35

Views

If $u$ is real valued function on $\Omega \subset \Bbb R^n$ then what is meant by $D^{\alpha} u$?

Published on 14 Apr 2026 - 19:21

score 63 · Answer 2 · 2026-04-15 18:31:51

63

Views

Show that for any three vectors A,B,C in n-space that $||B-A|| \le ||C-A|| + ||C-B||$

Published on 15 Apr 2026 - 18:31

score 57 · Answer 3 · 2026-04-09 03:48:50

57

Views

Limits of Multivariate Function

Published on 09 Apr 2026 - 3:48

score 61 · Answer 4 · 2026-04-17 04:56:37

61

Views

What is the correct parametrisation of this curve, and why is it so?

Published on 17 Apr 2026 - 4:56

score 52 · Answer 5 · 2026-04-15 00:05:57

52

Views

Theorem application

Published on 15 Apr 2026 - 0:05

score 148 · Answer 6 · 2026-03-25 08:02:41

148

Views

For each of the following equations, prove it can be solved for x as a $C^1$-function of y and z in a neighborhood of (0,0,0)

Published on 25 Mar 2026 - 8:02

score 591 · Answer 7 · 2026-04-12 23:01:19

591

Views

How to change the order of integration for this?

Published on 12 Apr 2026 - 23:01

score 1.8k · Answer 8 · 2026-04-12 13:07:56

1.8k

Views

Does a unique global and local minimum imply (strict) convexity?

Published on 12 Apr 2026 - 13:07

score 97 · Answer 9 · 2026-04-20 23:46:21

97

Views

$f$ differentiable, $|f|$ constant $\Longrightarrow \det J_{f} = 0$.

Published on 20 Apr 2026 - 23:46

score 205 · Answer 10 · 2026-04-09 17:58:20

205

Views

Dealing with absolute value norm in multiple integral type questions

Published on 09 Apr 2026 - 17:58

score 1.1k · Answer 11 · 2026-04-13 19:03:26

1.1k

Views

If $f:\mathbb{R}^2\to\mathbb{R}^1$ is of class $C^1$, show that $f$ is not one-to-one.

Published on 13 Apr 2026 - 19:03

score 54 · Answer 12 · 2026-04-13 00:40:36

54

Views

Question concerning changing order of integration in the following double integral

Published on 13 Apr 2026 - 0:40

score 1.3k · Answer 13 · 2026-04-17 04:03:08

1.3k

Views

Applying Green's theorem on scalar fields

Published on 17 Apr 2026 - 4:03

score 1k · Answer 14 · 2026-04-14 03:42:39

If the total differential is a scalar, how can it also be a covector used to calculate the directional derivative at a point?

score 771 · Answer 15 · 2026-04-12 07:53:49

771

Views

Equivalent definition of subharmonic functions.

Published on 12 Apr 2026 - 7:53

List Question

If $u$ is real valued function on $\Omega \subset \Bbb R^n$ then what is meant by $D^{\alpha} u$?

Show that for any three vectors A,B,C in n-space that $||B-A|| \le ||C-A|| + ||C-B||$

Limits of Multivariate Function

What is the correct parametrisation of this curve, and why is it so?

Theorem application

For each of the following equations, prove it can be solved for x as a $C^1$-function of y and z in a neighborhood of (0,0,0)

How to change the order of integration for this?

Does a unique global and local minimum imply (strict) convexity?

$f$ differentiable, $|f|$ constant $\Longrightarrow \det J_{f} = 0$.

Dealing with absolute value norm in multiple integral type questions

If $f:\mathbb{R}^2\to\mathbb{R}^1$ is of class $C^1$, show that $f$ is not one-to-one.

Question concerning changing order of integration in the following double integral

Applying Green's theorem on scalar fields

If the total differential is a scalar, how can it also be a covector used to calculate the directional derivative at a point?

Equivalent definition of subharmonic functions.

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