Hain's Hodge structure from a cotangent-fiber microsheaf
Hain's Hodge structure from a cotangent-fiber microsheaf
Let be a simply connected algebraic variety. Hain's bar construction equips the cohomology, and at the chain level a suitable model, of the based loop space with a mixed Hodge structure. A cotangent fiber is the object corresponding to a cotangent fiber under the microsheaf description of the cotangent bundle.
Cotangent-fiber Hodge microsheaf conjecture. Hain's Hodge structure is induced by a Hodge microsheaf whose underlying microsheaf corresponds to a cotangent fiber.
The conjecture proposes a geometric realization of Hain's loop-space Hodge structure through Hodge microsheaves; establishing such a realization is the remaining issue.
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Sources & referencesView supporting material
Primary source
Tatsuki Kuwagaki and Takahiro Saito, “Hodge microsheaves on cotangent bundles and plumbings”, arXiv:2502.04148 (2025).
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