Illusie mentions tape recordings of Grothendieck explaining his trace formula and more. Are they or similar recordings online? I guess, even if (what I doubt) everything he thought about that is somewhere in print, it would give an interesting insight in his way of thinking.

  • $\begingroup$ Despite the question mark at the end, I don't see what the question is. What kind of answer are you looking for? $\endgroup$ Oct 26, 2009 at 14:07
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    $\begingroup$ This seems like a real question to me: Are there any audio copies of Grothendieck's lectures, and can they be found online? $\endgroup$ Oct 26, 2009 at 14:09
  • $\begingroup$ I would rephrase the question as: I hear there are recordings of Grothendieck speaking. Are they online somewhere? Are there transcriptions online? $\endgroup$
    – Jason Dyer
    Oct 26, 2009 at 14:16
  • $\begingroup$ I agree that this is a real question, even though it doesn't read like one. $\endgroup$ Oct 26, 2009 at 14:35
  • $\begingroup$ Q. just reformulated, I hope now clearer. $\endgroup$ Oct 26, 2009 at 14:35

4 Answers 4


Illusie told me last year that these tapes of his meetings with Grothendieck are somewhere in his basement where they're very hard to find, so they're certainly not online.

The recording of Illusie's reminisces of Grothendieck to which both posts link has been transcribed here. Drinfeld and Illusie will be releasing a more polished version at some point next year.

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    $\begingroup$ Thanks. Let's hope that they get secured and copied sometime before they deteriorate. $\endgroup$ Oct 27, 2009 at 10:41
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    $\begingroup$ Unfortunately the link to the transcriptions is broken. $\endgroup$ Jul 17, 2013 at 17:54

Will we continue Scientific Research http://cds.cern.ch/record/912518?ln=en Allons nous continuer la Recherche Scientifique Recording number CERN-AUDIO-1972-003 Speaker(s) Grothendieck,A Date 27 January 1972 Duration 138 minutes Language French Keywords Science Synopsis Réflexions sur la science- responsabilité du savant Copyright © 1972 CERN Notes partie 1: exposé partie 2: questions f/a partie 3: questions f/a Listen to Part 1: Part 2: Part 3:

100 hours of audio of lectures of Grothendieck http://www.archmathsci.org/catalogue/general-chronology-of-recordings-since-1973/chronology-of-recordings-1973-1980/1973-recordings/ 1973 Recordings Lecture Courses by Alexandre GROTHENDIECK 3 Lecture Courses on respectively 1. Algebraic Geometry 2. The Theory of Algebraic Groups 3. Topos Theory

The copyright of all these recordings is that of the Department of Mathematics of SUNY at Buffalо.

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    $\begingroup$ Not available as of now. Was it before ? $\endgroup$
    – Olorin
    Nov 15, 2014 at 21:06
  • $\begingroup$ Not available but there is this, and you can hear a part of this from the 18th minute in the talk Un topo sur les topos by Alain Connes. <span class="d-none">$\endgro $\endgroup$
    – Watson
    Jan 25, 2019 at 15:28

Now you can access the audio lectures that Grothendieck gave at Buffalо in 1973.

Lectures on Topoi

Algebraic geometry

Algebraic groups

Thèmes pour une Harmonie

In the section 1973.

The page is still work in progress.


There is a recording of Illusie talking about Grothendieck at The Grothendieck circle. I couldn't find any recordings of Grothendieck himself.


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