85 citations · 86 across the 3 of their papers we have counts for
4 papers
Proof of a conjecture on unimodality
Yi Wang, Yeong-Nan Yeh
Let be a polynomial of degree , with nonnegative and non-decreasing coefficients. We settle the conjecture that for any positive real number , the coefficients of $P(x…
On unimodality problems in Pascal's triangle
Xun-Tuan Su, Yi Wang
Many sequences of binomial coefficients share various unimodality properties. In this paper we consider the unimodality problem of a sequence of binomial coefficients located in a…
Polynomials with real zeros and Polya frequency sequences
Yi Wang, Y. -N. Yeh
Let and be two real polynomials whose leading coefficients have the same sign. Suppose that and have only real zeros and that interlaces or …
Log-concavity and LC-positivity
Yi Wang, Yeong-Nan Yeh
A triangle of nonnegative numbers is LC-positive if for each , the sequence of polynomials is -log-concave. It is double…