Archive for Casa Matemática Oaxaca
San Jeronimo Tlacochahuaya [jatp]
Posted in pictures, Travel with tags BIRS-CMO, Casa Matemática Oaxaca, church, jatp, Mexico, Oaxaca, San Jeronimo Tlacochahuaya on November 28, 2021 by xi'an
snapshot from Mitla, Oaxacan
Posted in Mountains, pictures, Travel with tags BIRS-CMO, Casa Matemática Oaxaca, church, conquistadors, Iglesia de San Pablo, jatp, Mexico, Oaxaca, San Pablo Villa de Mitla, Zapotec civilization on November 28, 2021 by xi'an
Foundations of objective Bayesian methodology [21w5107]
Posted in Mountains, pictures, Statistics, Travel, University life with tags Banff International Research Station for Mathematical Innovation, BIRS-CMO, Casa Matemática Oaxaca, CMO, COVID-19, foundations of objective Bayesian methodology, Mexico, O'Bayes, Oaxaca, stray dogs, subjective versus objective Bayes, workshop on November 24, 2021 by xi'an
After years in the making (!), our BIRS-CMO workshop on the foundations of O’Bayes is at last taking place! In an hybrid format as BIRS-CMO is restricting the attendance to 15 people on site, instead of the customary (i.e., pre-COVID) 35. Still, it is quite exciting to join this workshop and the friends who will gather in Mexico or on-line to discuss objective Bayesian tools and prospects. And of course to visit for the second time the city of Oaxaca, its temples and markets! (Hopefully managing the stray dogs when running. If running.)
end-to-end Bayesian learning [CIRM]
Posted in Books, Kids, Mountains, pictures, Running, Statistics, University life with tags Bayesian learning, calanques, call for contributions, Casa Matemática Oaxaca, CIRM, CNRS, Fall, high dimensions, Luminy, Marseille, Méditerranée, mini-courses, Parc National des Calanques, robust Bayesian methods, scalable MCMC, Société Mathématique de France, Sugiton, workshop on February 1, 2021 by xi'an
Next Fall, there will be a workshop at CIRM, Luminy, Marseilles, on Bayesian learning. It takes place 22-29 October 2021 on this wonderful campus at the border with the beautiful Parc National des Calanques, in a wonderfully renovated CIRM building and involves friends and colleagues of mine as organisers and plenary speakers. (I am not involved!, but plan to organise a scalable MCMC workshop there the year after!) The conference is well-supported and the housing fees will be minimal since the centre is also subsidized by CNRS. The deadline for contributed talks and posters is 22 March, while it is 15 June for registration. Hopefully by this time the horizon will have cleared up enough to consider traveling and meeting again. Hopefully. (In which case I will miss this wonderful conference due to other meeting and teaching commitments in the Fall.)
non-reversible gerrymandering
Posted in Books, Statistics, Travel, University life with tags Casa Matemática Oaxaca, CIRM, gerrymandering, graphical model, lifting, non-reversible MCMC, Oaxaca, voting paradox on September 3, 2020 by xi'an
Gregory Herschlag, Jonathan C. Mattingly [whom I met in Oaxaca and who acknowledges helpful conversations with Manon Michel while at CIRM two years ago], Matthias Sachs, and Evan Wyse just posted an arXiv paper using non-reversible MCMC methods to improve sampling of voting district plans towards fighting (partisan) Gerrymandering. In doing so we extend thecurrent framework for construction of non-reversible Markov chains on discrete samplingspaces by considering a generalization of skew detailed balance. Since this means sampling in a discrete space, the method using lifting. Meaning adding a dichotomous dummy variable, “based on a notion of flowing the center of mass of districts along a defined vector field”. The paper is quite detailed about the validation and the implementation of the method. With this interesting illustration for the mixing properties of the different versions:
