1 citations · 2 across the 5 of their papers we have counts for
5 papers
Learning Discrete Directed Acyclic Graphs via Backpropagation
Andrew J. Wren, Pasquale Minervini, Luca Franceschi +1
Recently continuous relaxations have been proposed in order to learn Directed Acyclic Graphs (DAGs) from data by backpropagation, instead of using combinatorial optimization. Howev…
Dark matter with excitable levels
Andrew J. Wren
This paper explores the possibility that dark matter particles are objects with a set of excitable levels, as for a string or drum. A change in excitation is associated with the ab…
Gravitational waves in a flat radiation-matter universe including anisotropic stress
Andrew J. Wren, Jorge L. Fuentes, Karim A. Malik
We present novel analytical solutions for linear-order gravitational waves or tensor perturbations in a flat Friedmann-Robertson-Walker universe containing two perfect fluids, radi…
A core-halo pattern of entropy creation in gravitational collapse
Andrew J. Wren
This paper presents a kinetic theory model of gravitational collapse due to a small perturbation. Solving the relevant equations yields a pattern of entropy destruction in a spheri…
Double power series method for approximating cosmological perturbations
Andrew J. Wren, Karim A. Malik
We introduce a double power series method for finding approximate analytical solutions for systems of differential equations commonly found in cosmological perturbation theory. The…