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We give an infinite family of functions involving the gamma function whose logarithmic derivatives are completely monotonic. Each such function gives rise to an infinitely divisible probability distribution. Other similar results are also obtained for specific combinations of the gamma and q-gamma functions.

- Carmen Chicone
- Encyclopedia of Complexity and Systems Science
- 2009

- MATH 565a, Carmen Chicone, Robert Sacker
- 2014

See course web page for more detailed information.

- Carmen Chicone, Weishi Liu
- SIAM J. Math. Analysis
- 2000

A persistence theorem for attracting invariant tori for systems subjected to rapidly oscillating perturbations is proved. The singular nature of these perturbations prevents the direct application of the standard persistence results for normally hyperbolic invariant manifolds. However, as is illustrated in this paper, the theory of normally hyperbolic… (More)

The spectrum of the kinematic dynamo operator for an ideally conducting fluid and the spectrum of the corresponding group acting in the space of continuous divergence free vector fields on a compact Rie-mannian manifold are described. We prove that the spectrum of the kinematic dynamo operator is exactly one vertical strip whose boundaries can be determined… (More)

- FRANCO OBERSNEL, PIERPAOLO OMARI, Carmen C. Chicone
- 2007

We extend a result of J. Andres and K. Pastor concerning scalar time-periodic first order ordinary differential equations without uniqueness, by proving that the existence of just one subharmonic implies the existence of large sets of subharmonics of all given orders. Since these periodic solutions must coexist with complicated dynamics, we might paraphrase… (More)

- Donato Bini, Christian Cherubini, Carmen Chicone, Bahram Mashhoon
- 2008

We study the linear post-Newtonian approximation to general rela-tivity known as gravitoelectromagnetism (GEM); in particular, we examine the similarities and differences between GEM and electrodynamics. Notwithstanding some significant differences between them, we find that a special nonstationary metric in GEM can be employed to show explicitly that it is… (More)

- James D Benson, Carmen C Chicone, John K Critser
- Journal of mathematical biology
- 2011

Cell volume and concentration regulation in the presence of changing extracellular environments has been studied for centuries, and recently a general nondimensional model was introduced that encompassed solute and solvent transmembrane flux for a wide variety of solutes and flux mechanisms. Moreover, in many biological applications it is of considerable… (More)

- Yingfei Yi, Wenxian Shen, +14 authors J. Ward

- C. Chicone
- 2002

The Jacobi equation in pseudo-Riemannian geometry determines the linearized geodesic flow. The linearization ignores the relative velocity of the geodesics. The generalized Jacobi equation takes the relative velocity into account; that is, when the geodesics are neighboring but their relative velocity is arbitrary the corresponding geodesic deviation… (More)