$ \newcommand\A{\mathrm{A}} \newcommand\C{\mathrm{C}} \newcommand\D{\mathrm{D}} \newcommand\E{\mathrm{E}} \newcommand\F{\mathrm{F}} \newcommand\G{\mathrm{G}} \newcommand\H{\mathrm{H}} \newcommand\h{\mathrm{h}} \newcommand\K{\mathrm{K}} \newcommand\L{\mathrm{L}} \newcommand\M{\mathrm{M}} \newcommand\t{\mathrm{t}} \newcommand{\bA}{\mathbf{A}} \newcommand{\bG}{\mathbf{G}} \newcommand{\bH}{\mathbf{H}} \newcommand{\bT}{\mathbf{T}} \newcommand{\bW}{\mathbf{W}} \newcommand{\Gm}{\bG_m} \newcommand\Ascr{\mathcal{A}} \newcommand\Cscr{\mathcal{C}} \newcommand\Dscr{\mathcal{D}} \newcommand\Escr{\mathcal{E}} \newcommand\Kscr{\mathcal{K}} \newcommand\Lscr{\mathcal{L}} \newcommand\Oscr{\mathcal{O}} \newcommand\Perfscr{\mathcal{P}\mathrm{erf}} \newcommand\Acscr{\mathcal{A}\mathrm{c}} \newcommand\heart{\heartsuit} \newcommand\cn{\mathrm{cn}} \newcommand\op{\mathrm{op}} \newcommand\gr{\mathrm{gr}} \newcommand\Gr{\mathrm{Gr}} \newcommand\fil{\mathrm{fil}} \newcommand\Ho{\mathrm{Ho}} \newcommand\dR{\mathrm{dR}} \newcommand\HH{\mathrm{HH}} \newcommand\HC{\mathrm{HC}} \newcommand\HP{\mathrm{HP}} \newcommand\TC{\mathrm{TC}} \newcommand\TP{\mathrm{TP}} \newcommand{\bMap}{\mathbf{Map}} \newcommand{\End}{\mathrm{End}} \newcommand{\Mod}{\mathrm{Mod}} \newcommand{\coMod}{\mathrm{coMod}} \newcommand{\Fun}{\mathrm{Fun}} \newcommand{\bMap}{\mathbf{Map}} \newcommand\bE{\mathbf{E}} \newcommand\bZ{\mathbf{Z}} \newcommand\bAM{\mathbf{AM}} \newcommand\bLM{\mathbf{LM}} \newcommand\Spec{\mathrm{Spec}} \newcommand\CAlg{\mathrm{CAlg}} \newcommand\aCAlg{\mathfrak{a}\CAlg} \newcommand\dCAlg{\mathfrak{d}\CAlg} $

What

A highly focused workshop on recent developments in $(\infty,\infty)$-categories. On 16-17 March, it will take place at the NITMB in downtown Chicago. On 18 March it will take place at the University of Chicago in Eckhart 206 and Ryerson 251.

Minicourses

David Gepner (JHU) and Hadrian Heine (MPIM).

Naruki Masuda (NU).

German Stefánich (MPIM).

Research talks

Ko Aoki (MPIM).

Tim Campion.

Martina Rovelli (Ottawa/UMass Amherst) [to be confirmed].

Tomer Schlank (Chicago).

NITMB Colloquium

David Spivak (Topos Institute).

Draft Schedule

M Tu W
0930 Talk 1 0900 Talk 5 0930 Talk 9
1100 Talk 2 1030 Talk 6 1100 Talk 10
1200 Lunch 1130 Lunch 1200 Lunch
1400 Talk 3 1330 Talk 7 1400 Talk 11
1530 Coffee 1435 Talk 8 1530 Coffee
1600 Talk 4 1535 Coffee 1600 Talk 12
  1600 Colloquium  

Titles and abstracts

TBD

Organizers

Benjamin Antieau, David Gepner, Naruki Masuda

Registration

Registration is required for access to the building and to the NITMB. You will not be able to attend the workshop without registering by the deadlines below.

The deadline to register and request funding is 31 January 2026. The deadline for registration is 15 February 2026. Register here via Google Forms.

Funding

Some funding is available for graduate students and early-career researchers. To apply for it, your registration must be received by 31 January 2026, with decisions made by 4 February 2026. For funding, besides registering, graduate students must have a letter of recommendation submitted on their behalf to me, at antieau@northwestern.edu, no later than 31 January 2026.

Lodging

Participants, even those we fund, are asked to book their own lodging and be reimbursed. We will book lodging for speakers. Suitable nearby hotels include the Warwick–Allerton or the Omni Hotel.

Travel

The NITMB is accessible via Amtrak through Chicago Union Station and via plane through Chicago O’Hare or Midway airports. For more details, see the NITMB’s getting here page.

Location

The workshop will take place in the lecture hall at the NITMB on Monday and Tuesday, 16 and 17 March. On Wednesday 18 March it will take place at the University of Chicago’s Hyde Park campus in Eckhart 206 and Ryerson 251.

Restaurants

There are no official meals planned for this workshop.

Acknowledgments

This conference is supported by the NSF grant DMS-2152235, FRG: higher categorical structures in algebraic geometry, by the Simons Collaboration on Perfection, and by the NITMB.