3 papers
stat.ME2025
Stability Analysis and Local Influence Diagnostics for an Extreme-Value Regression Model of Anomalous Wind Gusts
José I. C. Lima, Raydonal Ospina, Michelli Barros +1
Extreme events in complex physical systems, such as anomalous wind gusts, often cause significant material and human damage. Their modeling is crucial for risk assessment and under…
q-fin.ST2025
Eigenvalue Distribution of Empirical Correlation Matrices for Multiscale Complex Systems and Application to Financial Data
Luan M. T. de Moraes, Antônio M. S. Macêdo, Giovani L. Vasconcelos +1
We introduce a method for describing eigenvalue distributions of correlation matrices from multidimensional time series. Using our newly developed matrix H theory, we improve the d…
q-fin.ST2025
Matrix H-theory approach to stock market fluctuations
Luan M. T. de Moraes, Antônio M. S. Macedo, Raydonal Ospina +1
We introduce matrix H theory, a framework for analyzing collective behavior arising from multivariate stochastic processes with hierarchical structure. The theory models the joint…