Geodesic
Stagnation Zones of Solutions to the Laplace–Beltrami Equation in Long Strips
Matematičeskie trudy, Tome 5 (2002) no. 1, pp. 84-101 
V. M. Miklyukov. Stagnation Zones of Solutions to the Laplace–Beltrami Equation in Long Strips. Matematičeskie trudy, Tome 5 (2002) no. 1, pp. 84-101. http://geodesic.mathdoc.fr/item/MT_2002_5_1_a5/
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     author = {V. M. Miklyukov},
     title = {Stagnation {Zones} of {Solutions} to {the~Laplace{\textendash}Beltrami} {Equation} in {Long} {Strips}},
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Voir la notice de l'article provenant de la source Math-Net.Ru

We study the stagnation zones for solutions to the Laplace–Beltrami equation, i.e. the domains ($s$-zones) in which the solutions are close to constants. The estimates for the sizes of $s$-zones in long strips are pointed out for various types of boundary conditions.

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