Study and Reading Groups

Venue: HIM lecture hall, Poppelsdorfer Allee 45

Study group on dg categories and non-commutative motives

Organizers: Patrick McFaddin and Lie Fu


  • Friday, May 26, 10:30 am
    First meeting
  • Wednesday, May 31, 4:30 pm
    Patrick McFaddin: Introduction to dg categories
  • Friday, June 2, 2:00 pm
    Artur Jackson: Model structures, smooth and proper dg categories
  • Tuesday, June 6, 2:00 pm
    Patrick McFaddin: Smooth and proper dg categories & universal additive invariant
  • Friday, June 9, 1:00 pm
    Lie Fu: Noncommutative Chow motives

Reading and discussion group on topological Hochschild and cyclic homology

Organizers: Alice Hedenlund and Calvin Woo


  • Thursday, June 1, 6:00 pm
    First meeting
  • Tuesday, June 6, 3:00 pm
    Calvin Woo: Equivariant stable homotopy theory

Reading group on the paper "Towards a Non-Archimedean analog of Bass-Quillen conjecture"

Organizer: Christian Dahlhausen

We will read the paper Moritz Kerz, Shuji Saito, Georg Tamme: Towards a non-archimedean analytic analog of the Bass-Quillen conjecture. Preprint, arXiv:1608.00703.


  • Wednesday, May 31, 6:00 pm
    First meeting
  • Friday, June 2, 3:30-4:00 and 4:30-5:00 pm
    Christian Dahlhausen: Introduction of the admissible topology
  • Wednesday, June 7, 4:30 pm
    Artur Jackson: Rigid spaces
  • Friday, June 9, 2:00 pm
    Ryomei Iwasa: Vanishing of additive cohomology
  • Monday, June 12, 2:30 pm
    Husney Parvez Sarwar: Vanishing of multiplicative cohomology
  • Wednesday, June 14, 4:30 pm
    Christian Dahlhausen: Homotopy invariance of Pic
  • Friday, June 16, 2:00 pm
    Christian Dahlhausen: K0-invariance

Study group on the Grayson-Suslin spectral sequence

Organizer: Heng Xie


  • Tuesday, June 6, 10:30 am
    First meeting
  • Friday, June 9, 10:30 am
    Manh Toan Nguyen: Weight filtration via commuting automorphisms
  • Tuesday, June 13, 10:30 am
    Marco Schlichting: Another construction of Grayson's tower
  • Tuesday, July 11, 10:30 am
    Ferdinando Zanchetta: K0 presheaves, K0plus presheaves and Presheaves with transfers
  • Friday, July 14, 10:30 am
    Jonas Irgens Kylling: Rationally contractible sheaves and Grayson's cohomology
  • Tuesday, July 18, 10:30 am
    Heng Xie: Cancellation theorem for Grayson's cohomology
  • Friday, July 21, 10:30 am
    Girja Tripathi: Cohomology with supports and proof of the main theorem