$ \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 in a location to be determined.

Minicourses

David Gepner (JHU).

Naruki Masuda (NU).

German Stefánich (MPIM).

Research talks

To be determined.

NITMB Colloquium

To be determined.

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 Collouquium  

Series titles and abstracts

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 15 January 2026. The deadline for registration is 15 February 2026. Registration will be open shortly.

Funding

Some funding is available for graduate students, early-career researchers, and others based in the USA. To apply for it, your registration must be received by 15 January 2026, with decisions made by 20 January 2026. For funding, graduate students must have a letter of recommendation submitted on their behalf to me, at antieau@northwestern.edu, no later than 15 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. The location on Wednesday 18 March is to be determined.

Restaurants

There are no official meals planned for this workshop.

Parking

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.