Recently [3] we proved a general zero density theorem for a large class of functions which included among others the Riemann zeta function, Dedekind zeta functions, Dirichlet 𝐿-functions. The goal of the present work is a (slight) improvement of this general theorem which might lead to stronger results in some applications.
Halász, G. Über die Mittelwerte multiplikativer zahlentheoretischer Funktionen. Acta Math. Hungar. 19, 3-4 (1968), 365–404.
Halász, G. and Turán, P. On the distribution of roots of Riemann zeta and allied functions, I. J. Number Theory 1 (1969), 121–137.
Pintz, J. On a general density theorem. Acta Arith., to appear
Titchmarsh, E. C. The theory of the Riemann zeta-function, Oxford, Clarendon Press, 1951.
Turán, P. On a new method of analysis and its applications. Pure and Applied Mathematics (New York). A Wiley-Interscience Publication, John Wiley & Sons, Inc., New York, 1984. xvi+584 pp. With the assistance of G. Halász and J. Pintz. With a foreword by Vera T. Sós.