Browsing by Author "Favini, Angelo"
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Article Citation Count: 46Regular boundary value problems for complete second order elliptic differential-operator equations in UMD Banach spaces(Springer, 2009) Favini, Angelo; Shakhmurov, Veli; Yakubov, YakovWe consider coerciveness and Fredholmness of nonlocal boundary value problems for complete second order elliptic differential-operator equations in UMD Banach spaces. In some special cases, the main coefficients of the boundary conditions may be bounded operators and not only complex numbers. Then, we prove an isomorphism, in particular, maximal L (p) -regularity, of the problem with a linear parameter in the equation. In both cases, the boundary conditions may also contain unbounded operators in perturbation terms. Finally, application to regular nonlocal boundary value problems for elliptic equations of the second order in non-smooth domains are presented. Equations and boundary conditions may contain differential-integral parts. The spaces of solvability are Sobolev type spaces W (p,q) (2,2) .
