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Topic Models -- and how to break them

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If you have a question about this talk, please contact Philip Sterne.

In the first half of this talk, I will given an introduction to topic models (mixtures of discrete distributions). I will also develop several models allowing inference conditional on features (metadata) of the document.

In a second part, I will present some negative results from an attempt to apply such models to very short documents from the web, demonstrating the limits of these models.

This talk is part of the Inference Group series.

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