You're reading the public-facing archive of the Category Theory Zulip server.
To join the server you need an invite. Anybody can get an invite by contacting Matteo Capucci at name dot surname at gmail dot com.
For all things related to this archive refer to the same person.
Keith Elliott Peterson (Feb 09 2024 at 07:34):I was reading Urs Schreiber's 'Higher Topos Theory', and he casually points out how quantum physics (being a linear theory) is given by probing a space via negative dimensional spheres in stable homotopy theory.
Are there any good resources on stable homotopy theory for someone unfamiliar with the stable homotopy theory and these negative spheres?
Ulrik Buchholtz (Feb 09 2024 at 07:38):You could start with Rok Gregoric' Spectra are your Friends: https://web.ma.utexas.edu/users/gregoric/Spectra%20Are%20Your%20Friends.pdf
John Baez (Feb 10 2024 at 17:48):That looks fun!