Divergence-free symmetric tensors seem ubiquitous in Mathematical Physics. We show that this structure occurs in models that are described by the so-called “second” variational principle, where the argument of the Lagrangian is a closed differential form. Divergence-free tensors are nothing but the second form of the Euler–Lagrange equations. The symmetry is associated with the invariance of the Lagrangian density upon the action of some orthogonal group.
@article{CRMATH_2022__360_G6_653_0, author = {Denis Serre}, title = {Symmetric {Divergence-free} tensors in the {Calculus} of {Variations}}, journal = {Comptes Rendus. Math\'ematique}, pages = {653--663}, publisher = {Acad\'emie des sciences, Paris}, volume = {360}, year = {2022}, doi = {10.5802/crmath.330}, zbl = {07547264}, language = {en}, }
Denis Serre. Symmetric Divergence-free tensors in the Calculus of Variations. Comptes Rendus. Mathématique, Volume 360 (2022), pp. 653-663. doi : 10.5802/crmath.330. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.5802/crmath.330/
[1] Relativistic fluids and magneto-fluids, Cambridge Monographs on Mathematical Physics, Cambridge University Press, 1989
[2] Calculus of variations with differential forms, J. Eur. Math. Soc., Volume 17 (2015) no. 4, pp. 1009-1039 | DOI | MR | Zbl
[3] Constant mean curvature surfaces, harmonic maps and integrable systems, Lectures in Mathematics, ETH Zürich, Birkhäuser, 2001 | DOI
[4] Gravitation, W. H. Freeman & Co, 1973
[5] Les ondes planes en électromagnétisme non linéaire, Physica D, Volume 31 (1988) no. 2, pp. 227-251 | DOI | Zbl
[6] Sur le principe variationnel des équations de la mécanique des fluides parfaits, M2AN, Math. Model. Numer. Anal., Volume 27 (1993), pp. 739-758 | DOI | Numdam | Zbl
[7] Non-linear electromagnetism and special relativity, Discrete Contin. Dyn. Syst., Volume 23 (2009), pp. 435-454 | DOI | MR | Zbl
Cité par Sources :
Commentaires - Politique