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Seminar

Graduate Student Seminar: q-de Rham cohomology and Habiro rings September 23, 2026 (10:00 AM PDT - 11:00 AM PDT)
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Location: SLMath: Eisenbud Auditorium, Online/Virtual
Speaker(s) Yuanning Zhang (Northwestern University)
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This talk introduces the two starting points of the workshop: deforming de Rham cohomology and assembling quantum invariants at roots of unity. Simple examples of the q-derivative and of evaluation in the Habiro ring illustrate the roles of q = 1 and roots of unity. We then outline how the arithmetic and topological perspectives meet in the study of Habiro cohomology.

Suggested references

Scholze, Canonical q-deformations in arithmetic geometry.

Wagner, q-Hodge complexes over the Habiro ring.

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