Autors: Dimitrov, S. I. Title: Square-free numbers of the form x^2+y^2+z^2+z+1 and x^2+y^2+z+1 Keywords: square-free number, asymptotic formula, Gauss sum, Salie sum Abstract: In this paper we study the distribution of square-free positive integers of the form x^2+y^2+z^2+z+1 and x^2+y^2+z+1. We establish asymptotic formulas for the number of triples of positive integers x, y, z ≤ H such that x^2+y^2+z^2+z+1 is square-free and such that x^2+y^2+z+1 is square-free. References Issue
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