ABSTRACT: A square complex matrix is called if it can be written in the form with being fixed unitary and being arbitrary matrix in . We give necessary and sufficient conditions for the existence of ...
ABSTRACT: In this paper we investigate weighted polynomial approximations with several variables. Our study relates to the approximation for by weighted polynomial. Then we will give some results ...
Abstract: This paper presents a short (and not exhaustive) introduction to the most used exact, approximation, and metaheuristic algorithms for solving hard combinatorial optimization problems. After ...
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