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Oral
Fast and Flexible Temporal Point Processes with Triangular Maps
Oleksandr Shchur · Nicholas Gao · Marin Biloš · Stephan Günnemann

Thu Dec 10 06:15 AM -- 06:30 AM (PST) @ Orals & Spotlights: Probabilistic Models/Statistics

Temporal point process (TPP) models combined with recurrent neural networks provide a powerful framework for modeling continuous-time event data. While such models are flexible, they are inherently sequential and therefore cannot benefit from the parallelism of modern hardware. By exploiting the recent developments in the field of normalizing flows, we design TriTPP - a new class of non-recurrent TPP models, where both sampling and likelihood computation can be done in parallel. TriTPP matches the flexibility of RNN-based methods but permits several orders of magnitude faster sampling. This enables us to use the new model for variational inference in continuous-time discrete-state systems. We demonstrate the advantages of the proposed framework on synthetic and real-world datasets.

Author Information

Oleksandr Shchur (Technical University of Munich)
Nicholas Gao (Technical University of Munich)
Marin Biloš (Technical University of Munich)
Stephan Günnemann (Technical University of Munich)

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