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Author: lievenlb

Le Guide Bourbaki : Cabris

“La Tribu” (“The Tribe”) was the internal Journal of the Bourbaki group between 1940 and 1977.

It’s main purpose was to record the editorial decisions made during the Bourbaki congresses, but it always started out with a humorous account of some of the events that happened during the meeting or in the world at large.

Every Tribe issue starts with a list of all people and things attending that meeting. Here’s one example, from the 1954 summer congress in Murols:



Some time ago, I’ve used the then available issues of “La Tribu” to locate the Hotels, Abbeys, Spas etc. where the Bourbaki congresses took place between 1940 and 1960. Here are some links:

In one of these post I pleaded:

“Dear Collaborators of Nicolas Bourbaki, please make all Bourbaki material (Diktat, La Tribu, versions) publicly available, certainly those documents older than 50 years.”

When I checked the Bourbaki Archives a few weeks ago, I was delighted to see that by now they have released all issues of “La Tribu” until 1973!

A few more places for me to locate, and a lot of fun intros to read.

From 1960 on, Cabris, in the Alpes-Maritime, near Grasse, and not too far from Cannes and Antibes, was by far the most popular congress spot for the second and third generation Bourbakistas.

Between 1960 and 1973 they visited the place no less than thirteen times, see the “La Tribu” issues nrs. 60,61,64,65,66,68,70,71,73,74,77,81 and 85.

Starting from 1965 they even held their annual two week summer conference there for five consecutive years.

Probably they kept returning there, even after 1973.

In the book Bourbaki, a secret society of mathematicians by Maurice Mashaal there are several photographs of the July 1975 Bourbaki Congress in Cabris.

Finding their popular venue is quite easy, as “La Tribu” usually mentions “La Messuguiere, Cabris”.




(Photo credit)

The “Villa La Messuguiere” has an interesting history.

In 1938, Mrs. Mayrisch, formerly Aline de Saint-Hubert, purchased a plot of land in Cabris and built a house there, which she called La Messuguière. The name is derived from ‘le messugue’, the Provençal name for the cottony cistus, or Cistus albidus, a characteristic shrub of the ‘garrigue’ which thrives there.



She took refuge at La Messuguiere in 1940 and remained there until her death on January 20, 1947.
During the war, she welcomed her friends Andre Gide, Jean Schlumberger, Roger Martin
du Gard
, Gaston Gallimard, Marie Delcourt, Alexis Curvers, Henri Michaux, and Andre Malraux.

Aline Mayrisch-de Saint-Hubert was attracted to the region because her friend Maria Van Rysselberghe, a Belgian writer and wife of the painter Theo Van Rysselberghe, lived at the ‘Villa Les Audides’, not far from La Messuguière.

Until 1979, Villa La Messuguiere hosted the French and international intellectual elite as paying guests. Gide was one of the first to settle there and received many visitors, among them: Henry de Montherlant, André Malraux and his wife Clara, Jean-Paul Sartre, and Albert Camus.

Clara Malraux wrote “Our Twenty Years” at the Villa, and Henri Thomas “The Promontory”, which earned him the Prix Fémina.

Apart from writers, also the philosopher Lucien Goldmann, the sociologist Georges Friedmann, the politician Jules Moch, and the micro-biologist and Nobel Prize winner Andre Lwoff stayed at La Messuguiere.

In the mid 1960s, at the height of their influence over French and international mathematics, the Bourbaki group probably only felt entitled to hold their meetings at this intellectual hotspot. Perhaps, the upcoming closure of the Villa as a conference centre in 1979 contributed to the rapid decline of the group in the late 1970s.



(Photo credit)

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The dangerous bend symbol

With the upcoming Breach album by 21 pilots I’ve noticed an influx of clikkies’ clicks on this blog looking for info about the Bourbaki group.

Perhaps this is a good opportunity to add some new posts in which I’m looking for potential connections between the ‘Dema/Trench lore’ surrounding 21 pilots’ albums Blurryface, Trench, Scaled and Icy, and Clancy, and historical facts about Nicolas Bourbaki.

Here’s a list of all lore-related Bourbaki posts so far:

The Clancy album was rather disappointing lore-wise, even though it started out promising with a clear reference to Bourbaki in its first song Overcompensate.

I said, I fly by the dangerous bend symbol (wait, what? Wait, what?)
Mm, don’t hesitate to maybe overcompensate
And then by the time I catch in my peripheral (wait, what? Wait, what?)
Mm, don’t hesitate to maybe overcompensate

First, let us clear up the confusion between the dangerous bend symbol, invented and used by the Bourbaki group, and the dangerous bend (road) sign which features on the back of the Clancy-album.



The dangerous bend road sign predates Bourbaki by at least a decade, see the Wikipedia commons on Historic road signs in Germany.

Already in 1907 it’s used on a road sign of the ‘Kaiserlicher Automobil Club’ (on the left) and from 1927 on as we know it today (on the right).



It’s unclear to me why they put the road sign on their album (perhaps for design reasons) rather than the bend symbol (the curly Z inside) which was used by the Bourbakistas (several of them studied in Germany in the 1920s) to indicate difficult paragraphs in their texts.

But even Bourbaki used the bend symbol only in their later works. In the first versions of their ‘Theorie des Ensembles’ they still used the ‘Danger de Mort’ or ‘Skull and Bones’ sign as precursor:



Now, what is the use of the dangerous bend symbol in 21pilots’ lore?

As far as I know, there is no further mention of this symbol but for one interview in which they relate it to the road sign. In the music videos of the Clancy-songs the dangerous bend symbol (not the sign) is clearly visible on the garbage can in front of the shop in the Backslide-video.



Here’s something strange.

If you look at the clip frame-by-frame from 0:18 till 0:21 you’ll see that twice some frames are cut out, first when he walks to his bike and then when he leaves with it. Both times in the vicinity of the trash can, or better, of the dangerous bend symbol.



It is as if the dangerous bend symbol is an indication of a time warp, action speeds up in its vicinity.

Or perhaps, it indicates a region where memory lapses occur?

Anyway, this could be a coincidence and merely an editing quirk.

However, in the remainder of the clip no further such quirks appear, until the very end (from 3:00 till 3:02) when he returns to the shop.

Then again, frames are missing twice. First when he arrives with the bike, and then after he dropped the sack in the garbage can.

To me this looks like something deliberate, and connected to the dangerous bend symbol.

What exactly is anybody’s guess, but no doubt all will become clear when Breach comes out in September.

This gives me just a couple of months to come up with more wild theories…

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Closure (2)

I told you six months ago that I’ll be out of my office by the end of summer and will no longer have access to the webserver running this blog.

There’s a slight possibility that the new inhabitant is willing to inherit said iMac and as long as (s)he doesn’t shut it down, this site may be online for a few extra months.

With help from Pieter Belmans I managed to create a static version of this blog on GitHub. Its URL is

https://lievenlebruyn.github.io/neverendingbooks

All internal links should work (if not, please tell me) and if you ever bookmarked a post here with URL something like
http://www.neverendingbooks.org/that_post
you’ll be able to view it till eternity comes using this URL: https://lievenlebruyn.github.io/neverendingbooks/that_post.

The more you link to the static GitHub version from now on, the more likely it is all static NeB posts will show up in a Google search.

I may even continue to blog and will update the GitHub repository whenever I can.

If you ever come in a similar situation (WordPress blogger, whose server will become unavailable, and want to set up a static version of your blog, with the possibility to keep on blogging) I’ll walk you through the main steps (and, if I could do this, anyone can).

1. Install Local.WP

On a computer you will continue to have access to, say your laptop (not serving to the web) install Local.WP which allows you to build local WordPress sites.

2. Clone your blog locally

Set up a default WP-blog, name it as your blog, say myblog, install all plugins you have on your regular blog and set it up to use your preferred theme.

Then. clone your blog with the export/import tool from WP. That is, export your blog and then import it in this local blog and delete the standard first post and page local.WP created.

Oh, and make sure you local site serves https (may be important later if you want to use the GitHub API). The local.wp helpfiles provide you with all info.

3. Get all internal links right

Install the Better search and replace plugin.

Use it to set all your internal links right. Assume your blog has address http://myblog.org and your local version serves it at https://myblog.local do a global search and replace of these two terms.

Check if indeed all local links (including images) work.

4. Make a GitHub repository

Set up a GitHub account, let’s call is myname and set up your first repository and name it after your blog myblog.

5. Do the Simply Static magic

Install on your local blog the Simply Static wordpress plugin.

In the general settings of Simply Static choose for replacing URLs ‘Absolute URLs’ and for scheme/host choose https://myname.github.io/myblog and force URL replacements.

Choose as your deployment method ‘ZIP archive’ and hit generate. When it finishes download the ZIP file.

6. Upload to GitHub pages

Upload the obtained folder to your GitHub repository and make it into a Github-page (lots of pages tell you how you can do both). You’re done, your static site is now available at https://myname.github.io/myblog.

If you would opt for the paid version of Simply Static the last step is done automatically (hence the importance of the https scheme on your local clone) and it promises to make even comments to your static site available as well as semi-automatic updates if you write a new post on your local blog.

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