PLACE

Summer Immersion: Symbolic Incompleteness, from Gödel-Tarski to Lacan – Guest Speaker Giuseppe Longo
2026-07-04 10:00 - 12:30 (America/Los_Angeles)
Begins July 4 @ 10:00 am – 12:30 pm PST by Zoom

The 2026 Summer Immersion focuses on developing a writing and reading of a symbolic incompleteness that persists not only across various mathematical and logical theories, but in the practice of analysis itself. Unfortunately, this incompleteness is often presented in a technical writing in the fields of mathematics and logic, while left at the level of hermeneutics and mystery in psychoanalysis. Both being inaccessible to the nonspecialist. Our aim is to both de-codify and de-mystify this writing.

To accomplish this goal, the Immersion often invites people who are noted in their respective fields to present their work to a ‘lay audience’, not as an act of vulgarization, but to raise questions and problems that may not have arisen in their intended applications.

Giuseppe Longo, a mathematician-logician, researcher, and director Emeritus at CNRS (Center national de la recherche scientifique) and ENS (École Normale Supérieure) in Paris, has been invited to this Summer Immersion to present his work on the subject matter, which in a first pass, Prof. Longo calls “The Imperative Pythagoreanism in today’s technosciences”.
Giuseppe Longo. Interfaces of Incompleteness. In Minati, G, Abram, M & Pessa, E (Eds.), Systemics of Incompleteness and Quasi-systems, Springer, New York, NY, 2018 (Incompleteness.pdf)
Giuseppe Longo. Reflections on Concrete Incompleteness, in Philosophia Mathematica, 19(3): 255-280, 2011. (Incompl-PhiloMath.pdf)
The Summer Immersion is scheduled to meet every Saturday for four weeks. Some Sundays may be included depending on the motivation and time of those working in the Immersion. Beginning the first weekend of July and ending the last weekend.

The Immersion is open to anyone with no prior background or experience, just a certain persistence in working with others to clarify a reading and writing. All texts, both original and published, will be provided online.
If you care to register, please do so early since the Immersion is limited to 15 people. The event will be held on Zoom with a donation welcome ($60.00 recommended, covering all four days), but anyone with a financial hardship can receive a pass.
To register, or if there are any questions, please write to: places@topoi.net

General Assembly
2026-06-20 10:00 - 12:30

Cartel: La langue and Le Langage
2026-06-04 19:30 - 22:00, 2026-05-17 10:00 - 12:00

Summer Break – Registration for the Fall 2026 begins Sept. 1, 2026
2026-06-01 08:00 - 17:00
The 2026 Winter-Spring semester has now concluded. The 2026 Fall Semester will begin Saturday, Sept. 26, at 10:00amPST to 12:30pm with its first seminar (subject to be announced). The cartels are announced the last week of Sept. and scheduled to begin the first week of Oct. To register for the Fall semester, contact: places@topoi.net

Cartel: Logic, Algebra, Geometry
2026-05-30 08:00 - 17:00

Peril of Structure
2026-05-23 10:00 - 12:30, 2026-05-09 10:00 - 12:30

Logic, Algebra, and Geometry
2026-05-16 10:00 - 12:00

Logic, Geometry, and Algebra Cartel
2026-05-02 08:00 - 17:00
Details

Date:
May 2
Time:

8:00 am – 5:00 pm

test 123
2026-04-26 08:00 - 17:00

The Peril of Structure / Seminar
2026-04-25 10:00 - 12:30
Details

Date:
April 25
Time:

10:00 am – 12:30 pm

Algebra, Logic, & Geometry/ Cartel
2026-04-18 10:00 - 12:30
Details

Date:
April 18
Time:

10:00 am – 12:30 pm
