The analytic–torsion orthogonal complement conjecture for FI-objects

Let \FIVAnly\FIVAnly be the \infty-category of analytic \FI\FI-objects, and let \FIVTors\FIVTors be the full sub-\infty-category of torsion \FI\FI-objects. For full subcategories A\mathcal A and T\mathcal T of an \infty-category, write T\mathcal T^{\perp} for the right orthogonal complement of T\mathcal T. Analytic–torsion orthogonal complement conjecture. The full sub-\infty-category \FIVAnly\FIVAnly is the right orthogonal complement of \FIVTors\FIVTors:

\FIVAnly=(\FIVTors).\FIVAnly=(\FIVTors)^{\perp}.

The preceding corollary shows that \FIVAnly\FIVAnly is contained in this right orthogonal complement; the conjecture asserts the converse inclusion, characterizing analytic \FI\FI-objects as precisely those right-orthogonal to torsion objects.

Sources & referencesView supporting material

Primary source

Kaya Arro, “FI-calculus and representation stability”, arXiv:2306.13597 (2023).

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