Geodesic
Helicity is the Only Invariant of Incompressible Flows whose Derivative is Continuous in the $C^1$ Topology
Matematičeskie zametki, Tome 99 (2016) no. 4, pp. 626-630.

Voir la notice de l'article provenant de la source Math-Net.Ru

Keywords: helicity, incompressible flow, exact divergence-free vector field, topological invariants of magnetic fields.
Mots-clés : flux 
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E. A. Kudryavtseva. Helicity is the Only Invariant of Incompressible Flows whose Derivative is Continuous in the $C^1$ Topology. Matematičeskie zametki, Tome 99 (2016) no. 4, pp. 626-630. http://geodesic.mathdoc.fr/item/MZM_2016_99_4_a15/

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