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In this paper, we prove a one level density result for the low-lying zeros of quadratic Hecke L-functions of imaginary quadratic number fields of class number 1. As a corollary, we deduce, essentially, that at least
$(19-\cot (1/4))/16 = 94.27\ldots \%$
of the L-functions under consideration do not vanish at 1/2.
$L$-functions
In this paper we prove some one-level density results for the low-lying zeros of families of quadratic and quartic Hecke 
$L$-functions of the Gaussian field. As corollaries, we deduce that at least 94.27% and 5%, respectively, of the members of the quadratic family and the quartic family do not vanish at the central point.
