10 papers
A Shared IPTC Topic Space for Cross-Source Topic Modelling
Din Iskakov, Sebastian Gonçalves, Marco Idiat +4
Comparing topic attention across different media is hindered by a fundamental modelling problem: topic models fitted separately to each corpus produce corpus-specific topic spaces…
Phase Transitions in Economic Inequality:Taxation and Extremal Replacement Dynamics
Lautaro Giordano, Sebastian Gonçalves, José Roberto Iglesias +1
We present a minimal agent-based model of interacting agents characterized by their wealth to study taxation and inequality in a non-conservative economy. Wealth evolves through an…
Epidemic Extinction in a Continuous SIRS Model with Vaccination
Germano Hartmann Brill, Pablo Enrique Jurado Silvestrin, Sebastian Gonçalves
Epidemics have shaped human history, often with devastating consequences, motivating the development of mathematical models to understand and control their dynamics. Among the many…
The number of spanning trees as an indicator of critical phenomena: When Kirchhoff meets Ising
Roberto da Silva, Henrique A. Fernandes, Paulo G. Freitas +3
Visibility graphs are spatial interpretations of time series. When derived from the time evolution of physical systems, the graphs associated with such series may exhibit propertie…
Limiting risk to reduce inequality: insights from the Yard-Sale model
Lautaro Giordano, Ignacio Cortés, Sebastian Gonçalves +1
Wealth inequality remains a critical socioeconomic challenge, driven by systemic dynamics and self-reinforcing mechanisms that amplify the economic imbalances. Simplified models fr…
Mean-field and Monte Carlo Analysis of Multi-Species Dynamics of agents
Eduardo Velasco Stock, Roberto da Silva, Sebastian Gonçalves
We propose a mean-field (MF) approximation for the recurrence relation governing the dynamics of species of particles on a square lattice, and we simultaneously perform Monte C…