List questions from multivariable-calculus

Published on 12 Apr 2026 - 6:24

169

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Using Lagrange Multiplier to prove identity

Published on 14 Apr 2026 - 4:46

185

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A calculus of Jacobian on a surface

Published on 25 Mar 2026 - 10:47

129

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Bifurcation, critical points and parameter dependence in $\nabla_r\,\phi_a(r) = 0$ when varying $a$

Published on 20 Apr 2026 - 12:54

945

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How many local extrema can a multidimensional polynomial have?

Published on 10 Apr 2026 - 16:51

477

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Are the following polynomials convex (or concave) on the interval $[0,1]^3$?

Published on 16 Apr 2026 - 8:31

58

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Need to show $|f(\sqrt 2,\sqrt 2) | \le 4$

Published on 13 Apr 2026 - 1:03

715

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Stuck on Jacobian matrix of $xx'Ax$

Published on 12 Apr 2026 - 3:46

224

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Directional Derivative as the correct generalization of the derivative?

Published on 16 Apr 2026 - 8:03

593

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Proof of Fermat's Theorem for Extrema

Published on 08 Apr 2026 - 6:34

3.4k

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Notation of Euler Lagrange Equations for multiple independent variables

Published on 16 Apr 2026 - 15:39

80

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Find if two variables function is differentiable: $f(x,y)=\frac{x(1-\cos x)}{\sin(x^2+y^2)}$

Published on 16 Apr 2026 - 0:29

387

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Unable to Understand a Proof from Do Carmo's Differential Geometry

Published on 11 Apr 2026 - 9:55

6.9k

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Lagrange multiplier plus or minus

Published on 15 Apr 2026 - 4:46

411

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Neural Network Gradient Descent of Cost Function Misunderstanding

Published on 25 Mar 2026 - 1:21

List Question

Multivariable chain rule - notation?

Using Lagrange Multiplier to prove identity

A calculus of Jacobian on a surface

Bifurcation, critical points and parameter dependence in $\nabla_r\,\phi_a(r) = 0$ when varying $a$

How many local extrema can a multidimensional polynomial have?

Are the following polynomials convex (or concave) on the interval $[0,1]^3$?

Need to show $|f(\sqrt 2,\sqrt 2) | \le 4$

Stuck on Jacobian matrix of $xx'Ax$

Directional Derivative as the correct generalization of the derivative?

Proof of Fermat's Theorem for Extrema

Notation of Euler Lagrange Equations for multiple independent variables

Find if two variables function is differentiable: $f(x,y)=\frac{x(1-\cos x)}{\sin(x^2+y^2)}$

Unable to Understand a Proof from Do Carmo's Differential Geometry

Lagrange multiplier plus or minus

Neural Network Gradient Descent of Cost Function Misunderstanding

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