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Georg Lehner
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The analogy between dualizable categories and compact Hausdorff spaces

Efimov has in his recent preprint, Appendix F, a long table of analogies between the categories $\text{Cat}^{dual}_{st}$ and $\text{CompHaus}^{op}$.

For example, both categories have a single $\omega_1$-compact generator ($\text{Shv}_{\geq 0}(\mathbb{R})$ and $[0,1]$), and they have coreflective subcategories given by compactly generated categories, $\text{Cat}^{cg}_{st}$, and profinite spaces, respectively.

Is there a way to make this table a bit more precise, say by turning it into a functor that preserves all the claimed properties on both sides? A natural guess would be to consider the functor $\text{CompHaus}^{op} \rightarrow \text{Cat}^{dual}_{st}, X \mapsto \text{Shv}(X; \text{Sp})$. But that for example doesn't map the interval to the $\omega_1$-compact generator. Another point is that maybe inside the larger category of compactly assembled categories this analogy can be made more precise?

Georg Lehner
  • 2.3k
  • 14
  • 28