Question

Proving a multivariable function is not differentiable and existence of partial derivatives

score 169 · Answer 1 · 2019-08-02 05:12:45

169

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Proving a multivariable function is not differentiable and existence of partial derivatives

Published on 02 Aug 2019 - 5:12

score 40 · Answer 2 · 2026-03-25 14:37:36

40

Views

Partial derivative of a matrix w.r.t. another matrix

Published on 25 Mar 2026 - 14:37

score 194 · Answer 3 · 2026-03-26 06:25:47

194

Views

Direct solution to maximum likelihood computation problem using the derivative of multivariate Gaussian w.r.t. covariance matrix

Published on 26 Mar 2026 - 6:25

score 27 · Answer 4 · 2019-08-05 05:41:22

27

Views

A condition for a function to be of separated variables

Published on 05 Aug 2019 - 5:41

score 147 · Answer 5 · 2019-08-05 08:09:43

147

Views

linear algebra: quadratic function minimum

Published on 05 Aug 2019 - 8:09

score 3.1k · Answer 6 · 2026-03-25 22:03:05

3.1k

Views

Hessian of Loss function ( Applying Newton's method in Logistic Regression )

Published on 25 Mar 2026 - 22:03

score 277 · Answer 7 · 2026-03-25 17:36:23

277

Views

Weak derivative under the integral sign

Published on 25 Mar 2026 - 17:36

score 134 · Answer 8 · 2019-08-07 15:31:55

134

Views

Need a Intuitive thinking for the proof of Mean value theorem for scalar field

Published on 07 Aug 2019 - 15:31

score 62 · Answer 9 · 2026-03-31 16:14:48

62

Views

How to take total derivative of $F^2 (x, \lambda \dot x)$ with respect to a scalar?

Published on 31 Mar 2026 - 16:14

score 165 · Answer 10 · 2019-08-07 20:36:18

165

Views

Bound on directional derivatives.

Published on 07 Aug 2019 - 20:36

score 14 · Answer 11 · 2026-03-25 16:07:06

14

Views

Loss Function for Minimizing Space Between Output Values

Published on 25 Mar 2026 - 16:07

score 32 · Answer 12 · 2019-08-08 16:55:50

32

Views

Given $\partial_{f} g=\frac{1}{x} \partial_{x}(\frac{F}{x})$, in order to have $g=g(f)$, why do we have to have $F=x^{3}G(f) + xH(f)$?

Published on 08 Aug 2019 - 16:55

score 149 · Answer 13 · 2026-02-23 03:56:13

149

Views

Help with a partial derivative and stationary point question (almost complete)?

Published on 23 Feb 2026 - 3:56

score 108 · Answer 14 · 2019-08-08 22:45:00

108

Views

$\frac {\partial} {\partial y'}\bigg(\frac {dF}{dx}\bigg)$

Published on 08 Aug 2019 - 22:45

score 72 · Answer 15 · 2026-03-26 15:17:18

72

Views

Why is $\nabla \cdot u=0$? (If $u=v\cos(k\cdot x)$)

Published on 26 Mar 2026 - 15:17

List Question

Proving a multivariable function is not differentiable and existence of partial derivatives

Partial derivative of a matrix w.r.t. another matrix

Direct solution to maximum likelihood computation problem using the derivative of multivariate Gaussian w.r.t. covariance matrix

A condition for a function to be of separated variables

linear algebra: quadratic function minimum

Hessian of Loss function ( Applying Newton's method in Logistic Regression )

Weak derivative under the integral sign

Need a Intuitive thinking for the proof of Mean value theorem for scalar field

How to take total derivative of $F^2 (x, \lambda \dot x)$ with respect to a scalar?

Bound on directional derivatives.

Loss Function for Minimizing Space Between Output Values

Given $\partial_{f} g=\frac{1}{x} \partial_{x}(\frac{F}{x})$, in order to have $g=g(f)$, why do we have to have $F=x^{3}G(f) + xH(f)$?

Help with a partial derivative and stationary point question (almost complete)?

$\frac {\partial} {\partial y'}\bigg(\frac {dF}{dx}\bigg)$

Why is $\nabla \cdot u=0$? (If $u=v\cos(k\cdot x)$)

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