Vygodchikova Irina Yuryevna RussiaSaratov Saratov State University, Russia, Saratov, Astrakhanskaya 83 доцент кафедры математической экономикиКандидат физико-математических наукVigodchikovaIY@info.sgu.ru Author's articles About the Retrofit of the Valle’e-Poussin’s Algorithm for Approximations of Multivalued Mappings by Algebraic Polynomial with Type Constraint Equality About the only Solution in the Problem of the Best Plural Reflection’s Approximation by Algebraic Polynomial