Gaps Between the Zeros of Epstein's Zeta-Functions on the Critical Line
Department of Mathematics, University of Turku FIN-20014 Turku, Finland; jutila{at}utu.fi
Institute of Mathematical Sciences Tharamani P. O., Chennai-600113, India; srini{at}imsc.res.in
Received 3 October 2003. Revision received 17 February 2004.
It is proved that Epstein's zeta-function
Q(s), related to a positive definite integral binary quadratic form, has a zero 1/2+i
with T
T + T5/11+
for sufficiently large positive numbers T. This improves a classical result of H. S. A. Potter and E. C. Titchmarsh (Proc. London Math. Soc. (2) 39 (1935) 372384). 2000 Mathematics Subject Classification 11E45 (primary), 11M41 (secondary).