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Bellman function for extremal problems in BMO

In this paper we develop the method of finding sharp estimates by using a Bellman function. In such a form the method appears in the proofs of the classical John--Nirenberg inequality and $L^p$ estimations of BMO functions. In the present paper we elaborate a method of solving the boundary value problem for the homogeneous Monge--Ampère equation in a parabolic strip for sufficiently smooth boundary conditions. In such a way we have obtained an algorithm of constructing an exact Bellman function for a large class of integral functionals in the BMO space.

preprint2012arXivOpen access
Paata IvanisviliNikolay OsipovDmitriy StolyarovVasily VasyuninPavel Zatitskiy
math.APmath.CA
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Paata IvanisviliNikolay OsipovDmitriy StolyarovVasily VasyuninPavel Zatitskiy

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