Saint-Flour, 2023

mathematical understanding of neural networks through mean-field analysis [PhD studenship]

Arnaud Guillin and Manon Michel from the Université Clermont-Auvergne are currently looking for PhD candidates interested in the mathematical analysis of neural networks via the tool of mean-field analysis. With full funding available. Candidates can contact Arnaud Guillin at uca.fr.

ABC in Clermont-Ferrand

Today I am taking part in a one-day workshop at the Université of Clermont Auvergne on ABC. With applications to cosmostatistics, along with Martin Kilbinger [with whom I worked on PMC schemes], Florent Leclerc and Grégoire Aufort. This should prove a most exciting day! (With not enough time to run up Puy de Dôme in the morning, though.)

space opera by John Scalzi [book review]

John Scalzi, author of the memorable Old Man’s War, has started a trilogy of which I only became aware recently (or more precisely became re-aware!), which has the perk of making two of the three books already published and hence available without a one or two year break. And having the book win the 2018 Locus Award in the meanwhile. This new series is yet again a space opera with space travel made possible by a fairly unclear Flow that even the mathematicians in the story have trouble understanding. And The Flow is used by guilds to carry goods and people to planets that are too hostile an environment for the “local” inhabitants to survive on their own. The whole setup is both homely and old-fashioned: the different guilds are associated with families, despite being centuries old, and the empire of 48 planets is still governed by the same dominant family, who also controls a fairly bland religion. Although the later managed to become the de facto religion.

“I’m a Flow physicist.  It’s high-order math. You don’t have to go out into the field for that.”

This does not sound much exciting, even for space operas, but things are starting to deteriorate when the novels start. Or more exactly, as hinted by the title, the Empire is about to collapse! (No spoiler, since this is the title!!!) However, the story-telling gets a wee bit lazy from that (early) point. In that it fixates on a very few characters [among millions of billions of inhabitants of this universe] who set the cogs spinning one way then the other then the earlier way… Dialogues are witty and often funny, those few characters are mostly well-drawn, albeit too one-dimensional, and cataclysmic events seem to be held at bay by the cleverness of one single person, double-crossing the bad guys. Mostly. While the second volume (unusually) sounds better and sees more action, more surprises, and an improvement in the plot itself, and while this makes for a pleasant travel read (I forgot The Collapsing Empire in a plane from B’ham!), I am surprised at the book winning the 2018 Locus Award indeed. It definitely lacks the scope and ambiguity of the two Ancillary novels. The convoluted philosophical construct and math background of Anathem. The historical background of Cryptonomicon and of the Baroque Cycle. Or the singularity of the Hyperion universe. (But I was also unimpressed by the Three-Body Problem! And by Scalzi’s Hugo Award Redshirts!) The third volume is not yet out.

As a French aside, a former king turned AI is called Tomas Chenevert, on a space-ship called Auvergne, with an attempt at coming from a French speaking planet, Ponthieu, except that is should have been spelled Thomas Chênevert (green oak!). Incidentally, Ponthieu is a county in the Norman marches, north of Rouen, that is now part of Picardy, although I do not think this has anything to do with the current novel!

tenure track position in Clermont, Auvergne

My friend Arnaud Guillin pointed out this opening of a tenure-track professor position at his University of Clermont Auvergne, in Central France. With specialty in statistics and machine-learning, especially deep learning. The deadline for applications is 12 May 2019. (Tenure-track positions are quite rare in French universities and this offer includes a limited teaching load over three years, potential tenure and titularisation at the end of a five year period, and is restricted to candidates who did their PhD or their postdoc abroad.)