January 2026 - Categories - Listes du LIPN

GdT demain
by Groupe de travail catégories 30 Jan '26

30 Jan '26

Hi! Tomorrow at 10:30 in B107 (we should have a key this time, even if it isn't the one that was lost...) Quentin will be continuing the reading group on Synthetic Differential Geometry. Last time he had told us about C-oo-rings, and this time he will be explaining how to build a site out of these which will house a model of SDG. I won't be there unfortunately, but Jonas still knows the login details so he should be able to get the BBB working: https://bbb.lipn.univ-paris13.fr/b/rog-vao-uwm-s2j Next week we may have Christian telling us something about K-theory if he is available (let me know @Christian) Best, Morgan

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tomorrow : Jonas on sheaves on cartesian spaces as a classifying topos
by Groupe de travail catégories 22 Jan '26

22 Jan '26

Dear all, tomorrow January 23, I will give a talk about "Sh(Cart) spaces as a classifying topos", following my notes [1,2]. Room B107 at 10h30 as usual. Best, Jonas PS: here's the BBB link in case anybody wants to watch remotely, but please let us know if you want to do so, so we can set it up: https://bbb.lipn.univ-paris13.fr/b/rog-vao-uwm-s2j [1] https://github.com/jonas-frey/pdfs/blob/master/cartesian-may-2023.pdf [2] https://github.com/jonas-frey/pdfs/blob/master/real-continuous.pdf

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Re: [GdT Categories] tomorrow : Quentin on C-infty rings
by Groupe de travail catégories 16 Jan '26

16 Jan '26

Finalement je l'ai retrouvé, je suis connecté. Le 16/01/2026 à 10:30, A. DJAMENT a écrit : > Cher(e)s collègues, > > > l'heure approche mais je n'ai pas le lien de connexion... Quelqu'un > pourrait-il le renvoyer ? > > Merci d'avance, > > Aurélien. > > Le 16/01/2026 à 07:57, Groupe de travail catégories a écrit : >> Bonjour tout le monde, et bonne année 2026 ! >> >> >> Je participerai en visio à la séance de ce matin. >> >> >> À bientôt, >> >> Aurélien. >> >> Le 15/01/2026 à 20:27, Groupe de travail catégories a écrit : >>> Reminder: We'll meet tomorrow (Friday 16 January) at 10:30 in B107, >>> and Quentin will tell us about C-infinity rings. >>> >>> Please let us know if you want to join remotely, so that we can set >>> up the BBB. >>> >>> Best, >>> >>> Jonas >>> >>> On 1/11/26 13:53, Groupe de travail catégories wrote: >>>> Hi! >>>> >>>> The poll results are in. We will meet on Friday morning in B107 at >>>> 10:30 from now on, at least until we move into the new building. I >>>> have booked the room accordingly. >>>> >>>> This Friday we will likely have a recap of what has been covered in >>>> the reading group so far plus a little extra. I'll send out a >>>> reminder and the BBB link later in the week. >>>> >>>> Bon dimanche, >>>> Morgan >>>> _______________________________________________ >>>> Categories mailing list >>>> Categories(a)lipn.univ-paris13.fr >>>> https://lipn.univ-paris13.fr/listes-lipn/listinfo/categories >>> _______________________________________________ >>> Categories mailing list >>> Categories(a)lipn.univ-paris13.fr >>> https://lipn.univ-paris13.fr/listes-lipn/listinfo/categories >> _______________________________________________ >> Categories mailing list >> Categories(a)lipn.univ-paris13.fr >> https://lipn.univ-paris13.fr/listes-lipn/listinfo/categories

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Nouveau créneau GdT
by Groupe de travail catégories 16 Jan '26

16 Jan '26

Hi! The poll results are in. We will meet on Friday morning in B107 at 10:30 from now on, at least until we move into the new building. I have booked the room accordingly. This Friday we will likely have a recap of what has been covered in the reading group so far plus a little extra. I'll send out a reminder and the BBB link later in the week. Bon dimanche, Morgan

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Sondage nouveau semestre
by Groupe de travail catégories 08 Jan '26

08 Jan '26

Happy New Year! Since some people's timetables will have changed from last semester, here is a new poll for the meeting time: https://www.when2meet.com/?34151870-DkBAn Please fill it in even if you would only be able to attend remotely. We will probably keep the chosen slot until the end of the academic year in July and choose again in September. We won't have a session tomorrow, but I hope to announce the new slot by the end of the week for next week. Please do let me know if you will have time to prepare something to present in the working group! Our next session will otherwise likely be a continuation of the reading group started in December. Best wishes, Morgan

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