List questions from calculus-of-variations

Published on 11 Apr 2026 - 1:44

194

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Partial Derivative of an Unknown Function with Multiple Parameters

Published on 29 Mar 2026 - 14:27

218

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Solution of elliptic problem is a minimizer of certain functional

Published on 09 Apr 2026 - 17:47

32

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How to calculate this variation？

Published on 10 Apr 2026 - 12:58

269

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Understanding Lagrangian/Hamiltonian Mechanics

Published on 10 Apr 2026 - 20:48

125

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First variation $\delta J$ with respect to the $\|\cdot\|_{1,\infty}$ norm

Published on 12 Apr 2026 - 12:02

371

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Gateaux derivative and Frechet derivative in calculus of variation

Published on 11 Apr 2026 - 19:36

161

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Determine two vectors so that any vector in null space A can be a linear combination of these two vectors

Published on 04 Nov 2021 - 19:10

71

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How do I solve $\left|X\right|\left|Y\right|-X\cdot Y\le\left|X-Y\right|^2$

Published on 05 Nov 2021 - 15:12

72

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Minimizing the variational problem $ I(y(x)) = \int_{0}^1 e^{-y'(x)^2}dx $

Published on 11 Apr 2026 - 22:02

49

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Finding the extremal of the problem $ I[y(x)] = \int_{x_1}^{x_2} \sqrt{ 1+ \left( \frac{dy}{dx} \right)^2 }dx $

Published on 06 Nov 2021 - 6:42

51

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Differential/Variation of a Functional in Gelfand/Fomin

Published on 06 Nov 2021 - 18:16

274

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Generalization of the Beltrami identity to two functions of two variables

Published on 29 Mar 2026 - 14:20

373

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Find a solid of revolution whose volume is 72π and whose surface area is 36π.

Published on 27 Mar 2026 - 6:59

44

Views

Find possible extrema of the functional $J(u)=\int_{0}^{2\pi}{u'(x)^2-4u(x)^2dx}$

Published on 14 Nov 2021 - 22:01

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Transit Time of a Boat

Partial Derivative of an Unknown Function with Multiple Parameters

Solution of elliptic problem is a minimizer of certain functional

How to calculate this variation？

Understanding Lagrangian/Hamiltonian Mechanics

First variation $\delta J$ with respect to the $\|\cdot\|_{1,\infty}$ norm

Gateaux derivative and Frechet derivative in calculus of variation

Determine two vectors so that any vector in null space A can be a linear combination of these two vectors

How do I solve $\left|X\right|\left|Y\right|-X\cdot Y\le\left|X-Y\right|^2$

Minimizing the variational problem $ I(y(x)) = \int_{0}^1 e^{-y'(x)^2}dx $

Finding the extremal of the problem $ I[y(x)] = \int_{x_1}^{x_2} \sqrt{ 1+ \left( \frac{dy}{dx} \right)^2 }dx $

Differential/Variation of a Functional in Gelfand/Fomin

Generalization of the Beltrami identity to two functions of two variables

Find a solid of revolution whose volume is 72π and whose surface area is 36π.

Find possible extrema of the functional $J(u)=\int_{0}^{2\pi}{u'(x)^2-4u(x)^2dx}$

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