List questions from calculus-of-variations

Published on 25 Mar 2026 - 16:01

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proving an interpolation inequality in $L^p$ norms

Published on 14 Jan 2019 - 23:08

417

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Existence of a minimizer by means of direct methodes

Published on 15 Jan 2019 - 1:34

106

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Is there a geometrical explanation for a method using critical points in a multivariable context

Published on 15 Jan 2019 - 21:12

74

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Derivatives of the eikonal

Published on 16 Jan 2019 - 13:45

218

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Why is compactness important to find solution of certain problems?

Published on 16 Jan 2019 - 17:37

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Solving the Euler-Lagrange equation for the brachistochrone problem with friction

Published on 25 Mar 2026 - 15:58

715

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Find the extremals of the functional $\int\sqrt{x^2+y^2}\sqrt{1+(y'(x))^2}dx$?

Published on 23 Jan 2019 - 22:18

216

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Show that the variational formulation has at most one solution

Published on 25 Mar 2026 - 3:18

55

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Is the functional $w \mapsto \int_0^1 | \ \| w(t) \| - 1 | \ dt$ $C^1$ or even smooth?

Published on 25 Mar 2026 - 1:02

107

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Finding extremals of a functional with integral function as integrand

Published on 25 Mar 2026 - 15:58

386

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Extension of Du-Bois-Raymond lemma to Vector Fields on a Riemannian Manifold

Published on 30 Jan 2019 - 21:37

355

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Euler-Lagrange equations for maximization problem

Published on 25 Mar 2026 - 15:56

457

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Is there a functional (i.e. infinite-dimensional) generalization of the second partial derivative test?

Published on 23 Feb 2026 - 2:08

1k

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Courant (1943) and History of Finite Element Method

Published on 22 Mar 2026 - 17:01

List Question

How to determine if an equation is an Euler-Lagrange equation of some functional?

proving an interpolation inequality in $L^p$ norms

Existence of a minimizer by means of direct methodes

Is there a geometrical explanation for a method using critical points in a multivariable context

Derivatives of the eikonal

Why is compactness important to find solution of certain problems?

Solving the Euler-Lagrange equation for the brachistochrone problem with friction

Find the extremals of the functional $\int\sqrt{x^2+y^2}\sqrt{1+(y'(x))^2}dx$?

Show that the variational formulation has at most one solution

Is the functional $w \mapsto \int_0^1 | \ \| w(t) \| - 1 | \ dt$ $C^1$ or even smooth?

Finding extremals of a functional with integral function as integrand

Extension of Du-Bois-Raymond lemma to Vector Fields on a Riemannian Manifold

Euler-Lagrange equations for maximization problem

Is there a functional (i.e. infinite-dimensional) generalization of the second partial derivative test?

Courant (1943) and History of Finite Element Method

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