Classifying anima of condensed $\infty$-categories of points

Peter J. Haine

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arXiv · 2602.21330

Classifying anima of condensed $\infty$-categories of points

Peter J. Haine

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Abstract

We compare the classifying anima of two natural condensed $\infty$-categories associated to a coherent $\infty$-topos. One from our work with Barwick and Glasman on exit-path categories in algebraic geometry, and the other from Lurie's work on ultracategories. The key consequence of our comparison is a connection between algebraic geometry and model theory: up to a mild completion, the pro\'{e}tale fundamental group of a scheme and the Lascar group of a complete first-order theory are both special cases of the same construction.

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Peter J. Haine. 2026-02-24. Classifying anima of condensed $\infty$-categories of points. https://arxiv.org/abs/2602.21330

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