Department of Mathematics


  •  Joshua Lam, Harvard
  •  Calabi-Yau threefolds and torsion in cohomology
  •  11/11/2020
  •  4:00 PM - 4:05 PM
  •  Online (virtual meeting) (Virtual Meeting Link)
  •  Laure Flapan (

I’ll discuss some explicit examples of Calabi-Yau threefolds (CY3s) with torsion in various cohomology groups and consequences of such torsion; in particular, I’ll present computations using p-adic Hodge theory which answer some outstanding questions about CY3s over finite fields. I will not assume familiarity with Calabi-Yau manifolds or p-adic Hodge theory.



Department of Mathematics
Michigan State University
619 Red Cedar Road
C212 Wells Hall
East Lansing, MI 48824

Phone: (517) 353-0844
Fax: (517) 432-1562

College of Natural Science