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Current Schedule
This Week
- Wednesday October 14 at 4:00 PM in RH 104
- Kailin Pan (IU), “On the Adams spectral sequence and the Hopf invariant one problem”
This is an expository talk on the Adams spectral sequence, with a particular focus on a simple proof of the Hopf invariant one problem. I will first recall the equivalent formulations of the Hopf invariant one problem and then review basic properties of the Adams spectral sequence, including computations of its $E_2$-page in low filtration degrees. Finally, I will explain the proof of the Hopf invariant one problem in detail.
Upcoming Weeks
- Wednesday October 21 at 4:00 PM in RH 104
- Adam Levine (Duke)
- Wednesday October 28 at 4:00 PM in RH 104
- Ningchuan Zhang (MPIM/IU)
- Wednesday December 2 at 4:00 PM in RH 104
- Jonathan Higgins (UIUC)
Next Semester
- Wednesday February 3 at 4:00 PM in RH 104
- M. Korkmaz (Middle Tennessee Technical Univ.)
IU/PU/IUPUI Joint Topology Seminar
- Fall 2026: Saturday October 17 at 10:00 AM
- IU/PU Joint Topology Seminar: Kevin Piterman (Purdue), "Rognes’ connectivity conjecture beyond linear groups"; Chris Kapulkin (Vanderbilt), "Fast persistent homology computations via Reduction to Zero Differentials"