## Soviet mathematics - doklady, Volume 20, Issues 1-3 |

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### Contents

I and Saksonov M T Necessary optimality conditions in control problems | 1 |

Bolmatov K H Pseudodifferential operators with an operator symbol | 10 |

Ibragimov A I and Novruzov A A On a criterion for regularity of a boundary point | 19 |

Copyright | |

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### Common terms and phrases

1980 Mathematics Subject affine connection Akad algebra American Mathematical Society analogous approximation arbitrary assume asymptotic Banach space boundary conditions boundary value problem bounded Cauchy CCCP Soviet Math coefficients compact complete Comput consider constant construct continuous converges convex Copyright Corollary corresponding defined Definition denote Dokl domain eigenvalues elliptic English transl equal equivalent estimate exists formula function given Hayx CCCP Soviet Hilbert space inequality integral interval inverse problem Lemma manifold mapping Mathematics Subject Classification matrix measure method metric modulus of continuity Moscow State University natural number Nauk SSSR Nauka norm normal algorithm obtain parameter polynomials Primary proof of Theorem regular regularizable representation respect Russian satisfies the condition selfadjoint sequence smooth subgroup subset subspace sufficient Suppose theory Tihonov tion topological topological space Translated unique University Received USSR variables vector zero