Extremal properties of the derivatives of the Newman polynomials

Tamás Erdélyi
2003 Proceedings of the American Mathematical Society  
Let Λ n−1 := {λ 1 , λ 2 , . . . , λn} be a set of n distinct positive numbers. The span of {e −λ 1 t , e −λ 2 t , . . . , e −λnt } over R will be denoted by E(Λ n−1 ) := span{e −λ 1 t , e −λ 2 t , . . . , e −λnt } . Our main result of this note is the following.
doi:10.1090/s0002-9939-03-06986-7 fatcat:ldpvqbwdjrdqpe2xizenwdznza