Optimal Posteriors for Chi-squared Divergence based PAC-Bayesian Bounds and Comparison with KL-divergence based Optimal Posteriors and Cross-Validation Procedure

no code implementations • 14 Aug 2020 • Puja Sahu, Nandyala Hemachandra

We investigate optimal posteriors for recently introduced \cite{begin2016pac} chi-squared divergence based PAC-Bayesian bounds in terms of nature of their distribution, scalability of computations, and test set performance.

Optimal PAC-Bayesian Posteriors for Stochastic Classifiers and their use for Choice of SVM Regularization Parameter

no code implementations • 14 Dec 2019 • Puja Sahu, Nandyala Hemachandra

This obviates the combinatorial search for subset support of the optimal posterior.