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- Juan Ignacio Perotti, Orlando Vito Billoni, Francisco A. Tamarit, Dante R. Chialvo, Sergio A. Cannas
- Physical review letters
- 2009

Although most networks in nature exhibit complex topologies, the origins of such complexity remain unclear. We propose a general evolutionary mechanism based on global stability. This mechanism is incorporated into a model of a growing network of interacting agents in which each new agent's membership in the network is determined by the agent's effect on… (More)

Non-Poissonian bursty processes are ubiquitous in natural and social phenomena, yet little is known about their effects on the large-scale spreading dynamics. In order to characterize these effects we devise an analytically solvable model of Susceptible-Infected (SI) spreading dynamics in infinite systems for arbitrary inter-event time distributions and for… (More)

- Hang-Hyun Jo, Juan Ignacio Perotti, Kimmo Kaski, János Kertész
- Physical review. E, Statistical, nonlinear, and…
- 2015

Inhomogeneous temporal processes in natural and social phenomena have been described by bursts that are rapidly occurring events within short time periods alternating with long periods of low activity. In addition to the analysis of heavy-tailed interevent time distributions, higher-order correlations between interevent times, called correlated bursts, have… (More)

- Juan Ignacio Perotti, Claudio J. Tessone, Guido Caldarelli
- Physical review. E, Statistical, nonlinear, and…
- 2015

The quest for a quantitative characterization of community and modular structure of complex networks produced a variety of methods and algorithms to classify different networks. However, it is not clear if such methods provide consistent, robust, and meaningful results when considering hierarchies as a whole. Part of the problem is the lack of a similarity… (More)

- Juan Ignacio Perotti, Hang-Hyun Jo, Petter Holme, Jari Saramäki
- ArXiv
- 2014

Juan Ignacio Perotti,1 Hang-Hyun Jo,1, 2, ∗ Petter Holme,3, 4, 5 and Jari Saramäki1 1BECS, School of Science, Aalto University, P.O. Box 12200, FI-00076, Finland 2BK21plus Physics Division and Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea 3Department of Energy Science, Sungkyunkwan University, 440-746… (More)

- Marco Bardoscia, Fabio Caccioli, Juan Ignacio Perotti, Gianna Vivaldo, Guido Caldarelli
- PloS one
- 2016

We consider a dynamical model of distress propagation on complex networks, which we apply to the study of financial contagion in networks of banks connected to each other by direct exposures. The model that we consider is an extension of the DebtRank algorithm, recently introduced in the literature. The mechanics of distress propagation is very simple: When… (More)

- Hang-Hyun Jo, Raj Kumar Pan, Juan Ignacio Perotti, Kimmo Kaski
- Physical review. E, Statistical, nonlinear, and…
- 2013

To understand the origin of bursty dynamics in natural and social processes we provide a general analysis framework in which the temporal process is decomposed into subprocesses and then the bursts in subprocesses, called contextual bursts, are combined to collective bursts in the original process. For the combination of subprocesses, it is required to… (More)

- Ana Laura Schaigorodsky, Juan Ignacio Perotti, Orlando Vito Billoni
- PloS one
- 2016

A series of recent works studying a database of chronologically sorted chess games-containing 1.4 million games played by humans between 1998 and 2007- have shown that the popularity distribution of chess game-lines follows a Zipf's law, and that time series inferred from the sequences of those game-lines exhibit long-range memory effects. The presence of… (More)

- Zhao Yang, Juan Ignacio Perotti, Claudio J. Tessone
- ArXiv
- 2017

Hierarchical organization is an important, prevalent characteristic of complex systems; in order to understand their organization, the study of the underlying (generally complex) networks that describe the interactions between their constituents plays a central role. Numerous previous works have shown that many real-world networks in social, biologic and… (More)

Biological networks of interacting agents exhibit similar topological properties for a wide range of scales, from cellular to ecological levels, suggesting the existence of a common evolutionary origin. A general evolutionary mechanism based on global stability has been proposed recently [J I Perotti, et al., Phys. Rev. Lett. 103, 108701 (2009)]. This… (More)