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A Yule-Simon process with memory
by: Ciro Cattuto and Vittorio Loreto and Vito D.P. Servedio
In: Europhysics Letters
, Vol. 76
, Nr. 2
(2006)
, p. 208-214.
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Abstract
The Yule-Simon model has been used as a tool to describe the growth of diverse systems, acquiring a paradigmatic character in many fields of research. Here we study a modified Yule-Simon model that takes into account the full history of the system by means of a hyperbolic memory kernel. We show how the memory kernel changes the properties of preferential attachment and provide an approximate analytical solution for the frequency distribution density as well as for the frequency-rank distribution.