The purpose of this study was to determine how political instability influences inbound tourist flows in Ukrainian cities, performance tourism-related businesses, and tourism-based profits general. This allows us present the impact various events on tourism economy Ukraine; however, available secondary data with unobserved component model procedure detection give only a general overview situati...

‎In this paper a new family of fifteenth-order methods with high efficiency index is presented‎. This family include four evaluations of the function and one evaluation of its first derivative per iteration.‎ ‎Therefore‎, ‎this family of methods has the efficiency index which equals 1.71877‎. ‎In order to show the applicability and validity of the class‎, ‎some numerical examples are discussed‎.