2 papers
math.ST2026
Symmetry Testing in Time Series using Ordinal Patterns: A U-Statistic Approach
Annika Betken, Giorgio Micali, Manuel Ruiz Marín
We introduce a general framework for testing temporal symmetries in time series based on the distribution of ordinal patterns. While previous approaches have focused on specific fo…
math.GR2010
Subgroup separability in integral group rings
Á. del Río, M. Ruiz Marín, P. Zalesski
We give a list of finite groups containing all finite groups such that the group of units of the integral group ring is subgroup separable. There are only two t…