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11 papers · 1 filter
Singularities of the Secant Variety
Pete Vermeire
We give positivity conditions on the embedding of a smooth variety which guarantee the normality of the secant variety, generalizing earlier results of the author and others. We al…
A Family of Generalized Beta Distributions for Income
J. H. Sepanski, Lingji Kong
The mathematical properties of a family of generalized beta distribution, including beta-normal, skewed-t, log-F, beta-exponential, beta-Weibull distributions have recently been st…
Edge Effects in Finite Elongated Graphene Nanoribbons
Oded Hod, Juan E. Peralta, Gustavo E. Scuseria
We analyze the relevance of finite-size effects to the electronic structure of long graphene nanoribbons using a divide and conquer density functional approach. We find that for hy…
On RSA Moduli with Almost Half of the Bits Prescribed
Sidney W. Graham, Igor E. Shparlinski
We show that using character sum estimates due to H. Iwaniec leads to an improvement of recent results about the distribution and finding RSA moduli , where and are p…
Half-metallic graphene nanodots
Oded Hod, Veronica Barone, Gustavo E. Scuseria
A comprehensive first-principles theoretical study of the electronic properties and half-metallic nature of finite rectangular graphene nanoribbons is presented. We identify the bi…
Limits of zeros of polynomial sequences
Xinyun Zhu, George Grossman
In the present paper we consider the characteristic polynomial of the -th order Fibonacci sequence, the latter denoted We determine…