@unpublished{SchulzeShlapunovTarkhanov2000, author = {Schulze, Bert-Wolfgang and Shlapunov, Alexander and Tarkhanov, Nikolai Nikolaevich}, title = {Green integrals on manifolds with cracks}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-25777}, year = {2000}, abstract = {We prove the existence of a limit in Hm(D) of iterations of a double layer potential constructed from the Hodge parametrix on a smooth compact manifold with boundary, X, and a crack S ⊂ ∂D, D being a domain in X. Using this result we obtain formulas for Sobolev solutions to the Cauchy problem in D with data on S, for an elliptic operator A of order m ≥ 1, whenever these solutions exist. This representation involves the sum of a series whose terms are iterations of the double layer potential. A similar regularisation is constructed also for a mixed problem in D.}, language = {en} } @article{ShlapunovTarchanov2022, author = {Shlapunov, Alexander A. and Tarchanov, Nikolaj Nikolaevič}, title = {Inverse image of precompact sets and regular solutions to the Navier-Stokes equations}, series = {Vestnik Udmurtskogo Universiteta. Matematika, mechanika, kompʹjuternye nauki}, volume = {32}, journal = {Vestnik Udmurtskogo Universiteta. Matematika, mechanika, kompʹjuternye nauki}, number = {2}, publisher = {Udmurtskij gosudarstvennyj universitet}, address = {Iževsk}, issn = {1994-9197}, doi = {10.35634/vm220208}, pages = {278 -- 297}, year = {2022}, abstract = {We consider the initial value problem for the Navier-Stokes equations over R-3 x [0, T] with time T > 0 in the spatially periodic setting. We prove that it induces open injective mappings A(s): B-1(s) -> B-2(s-1) where B-1(s), B-2(s-1) are elements from scales of specially constructed function spaces of Bochner-Sobolev typeparametrized with the smoothness index s is an element of N. Finally, we prove that a map Asis surjective if and only if the inverse image A(s)(- 1) (K) of any pre compact set K from the range of the map Asis bounded in the Bochner space L-s([0, T], L-r(T-3))with the Ladyzhenskaya-Prodi-Serrin numbers s, r.}, language = {en} }