### Grothendieck Conference

#### Posted by John Baez

There’s a conference on Grothendieck’s work coming up soon here in Southern California!

- Grothendieck’s approach to mathematics, May 24-28, 2022, Chapman University, Orange, California. Organized by Peter Jipsen (Mathematics), Alexander Kurz (Computer Science), Andrew Mosher (Mathematics and Computer Science), Marco Panza (Mathematics and Philosophy), Ahmed Sebbar (Physics and Mathematics), Daniele Struppa (Mathematics).

To attend in person register here. To attend via Zoom go here. The talks will be recorded, and I hear they will be made available later on YouTube.

Here’s the program:

### 24th Tuesday

8:45 – 9:00 Welcome by Michel IBBA, dean of the Schmid College of Science and Technology

9:00 – 10:00 Marco Panza (Chapman, CNRS) Grothendieck’s promenade, or the eulogy of aloneness. An introduction to Grothendieck’s spirit by his own words

10:00 – 11:00 Fernando Zalamea (Univ. Nacional de Colombia): A Unitary vision of Grothendieck’s 40 main years (1951-1991): The Models TSK (Topos of Sheaves over Kripke Models)

11:00 – 11:15 Coffee Break

11:15 – 12:15 Kevin Buzzard (Imperial College London; by zoom): Grothendieck’s approach to equality

12:15 – 1:15 Jean Pierre Marquis (Univ. of Montréal): Grothendieck, Bourbaki and mathematical structuralism

1:15 – 2:30 Lunch

2:30 – 3:30 Colin McLarty (Case Western Reserve Univ.): Grothendieck did not believe in universes, he believed in topos and schemes

3:30 – 4:30 Elaine Landry (UC Davis): As if category theory were a foundation

4:30 – 5:30 Jean-Jacques Szczeciniarz (Univ Paris Cité): On some points of homological algebra

6:30 Welcome dinner at Chapman campus

### 25th Wednesday

9:00 – 10:00 John Baez (U.C. Riverside): Motivating motives

10:00 – 11:00 Simona Paoli (Univ. of Aberdeen; by zoom): From higher groupoids to higher categories

11:00 – 11:15 Coffee Break

11:15 – 12:15 Brice Halimi (Univ. Paris Cité): Context-dependence and descent theory

12:15 – 1:15 Goro Kato (Cal Poly): The Descent methods for phenomena of organization-emergence

1:15 – 2:30 Lunch

2:30 – 3:30 Jessica Carter (Aarhus Univ.): Grothendieck’s contribution to K-theory and some consequences for the ontology of mathematics

3:30 – 4:30 Frederic Jaeck (Univ. of Aix-Marseille): A philosophy in the shade of Grothendieck’s mathematics

4:30 – 5:30 Carmen Martinez (UNAM): Conjectures, counterexamples and A. Grothendieck

7:00 Gala Dinner at the Chapman President Residence

### 26th Thursday

9:00 – 10:00 Ahmed Sebbar (Chapman) Euler’s Products

10:00 – 11:00 Yves Adré (Sorbonne Univ., Paris; by zoom): Grothendieck and differential equations

11:00 – 11:15 Coffee Break

11:15 – 12:15 Daniele Struppa (Chapman): Superoscillatory sequences and infinite order differential operators

12:15 – 1:15 Mohamed Saidi (Univ. of Exeter): The anabelian geometry of Grothendieck

1:15 – 2:30 Lunch

2:30 – 3:30 Pino Rosolini (Univ. of Genova): Grothendieck fibrations, or when aesthetics drives mathematics

3:30 – 4:30 Simon Henry (Univ. of Ottawa; by zoom): Grothendieck’s homotopy hypothesis

4:30 – 5:30 Drew Moshier (Chapman) On “logical” duals of compact Hausdorff spaces

6:30 Conference Dinner in Old Orange

### 27th Friday

9:00 – 10:00 Andrés Villaveces (Univ. Nacional de Colombia): Galoisian model theory: the role(s) of Grothendieck (à son insu!)

10:00 – 11:00 Olivia Caramello (Univ. of Insubria; by Zoom): The “unifying notion” of topos

11:00 – 11:15 Coffee break

11:15 – 12:15 Mike Shulman (Univ. of San Diego): Lifting Grothendieck universes to Grothendieck toposes

12:15 – 1:15 José Gil-Ferez (Chapman Univ.) The isomorphism theorem of algebraic logic: a categorical perspective

1:15 – 2:30 Lunch

2:30 – 3:30 Oumar Wone (Chapman) : Vector bundles on Riemann surfaces according to Grothendieck and his followers

3:30 – 4:30 Claudio Bartocci (Univ. of Genova): The inception of the theory of moduli spaces: Grothendieck’s Quot scheme

4:30 – 5:30 Christian Houzel (IUFM de Paris): Riemann surfaces after Grothendieck [presented by J.J. Szczeciniarz]

### 28th Saturday

9:00 – 10:00 Silvio Ghilardi (Univ. degli Studi, Milano): Investigating definability in propositional logic via Grothendieck topologies and sheaves

10:00 – 11:00 Matteo Viale (Univ. of Turin; by zoom): The duality between Boolean valuated models and topological presheaves

11:00 – 11:15 Coffee break

11:15 – 12:15 Benjamin Collas (RIMS, Kyoto Univ.): Galois-Teichmüller: arithmetic geometric principles

12:15 – 1:15 Closing: general discussion animated by Alex Kurz (Chapman)