Geodesic
Continuous Approximations of Goldshtik's Model
Matematičeskie zametki, Tome 87 (2010) no. 2, pp. 262-266.

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We consider continuous approximations to the Goldshtik problem for separated flows in an incompressible fluid. An approximated problem is obtained from the initial problem by small perturbations of the spectral parameter (vorticity) and by approximating the discontinuous nonlinearity continuously in the phase variable. Under certain conditions, using a variational method, we prove the convergence of solutions of the approximating problems to the solution of the original problem.
Keywords: continuous approximation, nonlinear elliptic differential equation, boundary-value problem, Laplace operator, discontinuous nonlinearity, separated flow. 
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D. K. Potapov. Continuous Approximations of Goldshtik's Model. Matematičeskie zametki, Tome 87 (2010) no. 2, pp. 262-266. http://geodesic.mathdoc.fr/item/MZM_2010_87_2_a7/

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