234 citations · 639 across the 28 of their papers we have counts for
4 papers · 1 filter
The tropicalization of the entropic barrier
Xavier Allamigeon, Abdellah Aznag, Stéphane Gaubert +1
The entropic barrier, studied by Bubeck and Eldan (Proc. Mach. Learn. Research, 2015), is a self-concordant barrier with asymptotically optimal self-concordance parameter. In this…
Probabilistic and mean-field model of COVID-19 epidemics with user mobility and contact tracing
M. Akian, L. Ganassali, S. Gaubert +1
We propose a detailed discrete-time model of COVID-19 epidemics coming in two flavours, mean-field and probabilistic. The main contribution lies in several extensions of the basic…
A convex programming approach to solve posynomial systems
Marianne Akian, Xavier Allamigeon, Marin Boyet +1
We exhibit a class of classical or tropical posynomial systems which can be solved by reduction to linear or convex programming problems. This relies on a notion of colorful vector…
Understanding and monitoring the evolution of the Covid-19 epidemic from medical emergency calls: the example of the Paris area
Stéphane Gaubert, Marianne Akian, Xavier Allamigeon +16
We portray the evolution of the Covid-19 epidemic during the crisis of March-April 2020 in the Paris area, by analyzing the medical emergency calls received by the EMS of the four…