Transcendence measures and algebraic growth of entire functions

• 成果类型: Article
• 署名作者: Coman, Dan; Poletsky, Evgeny A.
• 署名单位: Syracuse University
• 刊物名称: INVENTIONES MATHEMATICAE
• ISSN/ISSBN: 0020-9910
• DOI: 10.1007/s00222-007-0058-x
• 发表日期: 2007
• 页码: 103-145
• 关键词: tangential markov inequalities

摘要

In this paper we obtain estimates for certain transcendence measures of an entire function f. Using these estimates, we prove Bernstein, doubling and Markov inequalities for a polynomial P(z,w) in C-2 along the graph of f. These inequalities provide, in turn, estimates for the number of zeros of the function P(z,f(z)) in the disk of radius r, in terms of the degree of P and of r. Our estimates hold for arbitrary entire functions f of finite order, and for a subsequence {n (j) } of degrees of polynomials. But for special classes of functions, including the Riemann zeta-function, they hold for all degrees and are asymptotically best possible. From this theory we derive lower estimates for a certain algebraic measure of a set of values f(E), in terms of the size of the set E.