Infinite Log-Concavity and r-Factor
Abstract
D. Uminsky and K. Yeats [6] studied the properties of the log- operator L on the subset of the finite symmetric sequences and prove the existence of an infinite region R, bounded by parametrically de- fined hypersurfaces such that any sequence corresponding a point of R is infinitely log concave. We study the properties of a new operator L_r and redefine the hypersurfaces which generalizes the one defined by Uminsky and Yeats [6]. We show that any sequence corresponding a point of the region R, bounded by the new generalized parametrically defined r-factor hypersurfaces, is Generalized r-factor infinitely log concave. We also give an improved value of r_0 found by McNamara and Sagan [4] as the log-concavity criterion using the new log-operator.
Keywords
Cite
@article{arxiv.1211.5496,
title = {Infinite Log-Concavity and r-Factor},
author = {Zahid Raza and Anjum Iqbal},
journal= {arXiv preprint arXiv:1211.5496},
year = {2012}
}