3 papers
math.ST2025
A Tractable Family of Smooth Copulas with Rotational Dependence: Properties, Inference, and Application
Michaël Lalancette, Robert Zimmerman
We introduce a new family of copula densities constructed from univariate distributions on . Although our construction is structurally simple, the resulting family is versat…
astro-ph.SR2024
Separating States in Astronomical Sources Using Hidden Markov Models: With a Case Study of Flaring and Quiescence on EV Lac
Robert Zimmerman, David A. van Dyk, Vinay L. Kashyap +1
We present a new method to distinguish between different states (e.g., high and low, quiescent and flaring) in astronomical sources with count data. The method models the underlyin…
math.PR2022
A new family of smooth copulas with arbitrarily irregular densities
Michaël Lalancette, Robert Zimmerman
Copulas are known to satisfy a number of regularity properties, and one might therefore believe that their densities, when they exist, admit a certain degree of regularity themselv…