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Lost Relatives of the Gumbel Trick

Accepted version
Peer-reviewed

Type

Conference Object

Change log

Authors

Tripuraneni, N 

Abstract

The Gumbel trick is a method to sample from a discrete probability distribution, or to estimate its normalizing partition function. The method re- lies on repeatedly applying a random perturbation to the distribution in a particular way, each time solving for the most likely configuration. We derive an entire family of related methods, of which the Gumbel trick is one member, and show that the new methods have superior properties in several settings with minimal additional computational cost. In particular, for the Gumbel trick to yield computational benefits for discrete graphical models, Gumbel perturbations on all configurations are typically replaced with so- called low-rank perturbations. We show how a subfamily of our new methods adapts to this set- ting, proving new upper and lower bounds on the log partition function and deriving a family of sequential samplers for the Gibbs distribution. Finally, we balance the discussion by showing how the simpler analytical form of the Gumbel trick enables additional theoretical results.

Description

Keywords

machine learning, statistics, partition function, Gumbel trick, ICML

Journal Title

ICML'17 Proceedings of the 34th International Conference on Machine Learning

Conference Name

ICML 2017

Journal ISSN

Volume Title

70

Publisher

ACM
Sponsorship
Alan Turing Institute under EPSRC grant EP/N510129/1, and by the Leverhulme Trust via the CFI.