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On the website of the Berkeley mathematics department there is mention (see this) of a colloquium held on november 5, 2020 (by Zoom) whose speaker was Shinichi Mochizuki, with a talk titled "Classical Roots of Inter-universal Teichmüller Theory". The corresponding slides seem to be online (see this). Here are my factual questions:

  1. did this event really occur ?
  2. if yes to 1, how was the speaker introduced ?
  3. if yes to 1, do the slides reflect all that was said, or were there other comments, and if so what ?
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    $\begingroup$ Out of curiosity, what is the motivation for asking (2)? $\endgroup$
    – YCor
    Commented Nov 7, 2020 at 17:19
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    $\begingroup$ The motivation for asking (1) also seems fairly unclear. I doubt the Berkeley mathematics department has a habit of inventing fictitious events. $\endgroup$
    – Arthur
    Commented Nov 7, 2020 at 18:06
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    $\begingroup$ The motivation for asking is (1) is that there is some controversy regarding the acceptance of the 4 papers of S.Mochizuki claiming a proof of the abc conjecture, and some talks around this have been canceled in the past. Regarding (2) I was wondering if the introduction would be factual or would mention the aforementioned 4 papers. It must be stressed that the colloquium chair is Ken Ribet, see this math.berkeley.edu/about/events/colloquium $\endgroup$
    – Archie
    Commented Nov 7, 2020 at 18:15
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    $\begingroup$ I heard once about Hirzebruch introducing Wiles at ICM, maybe 1994, and it included something such as "... and possible applications to number theory". $\endgroup$
    – YCor
    Commented Nov 7, 2020 at 20:02
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    $\begingroup$ @Arthur it's possible there was a last-minute cancellation. $\endgroup$
    – Nguyen
    Commented Nov 8, 2020 at 8:52

1 Answer 1

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  1. Yes it really occurred.

  2. He was introduced in the normal way, something like "Today we have Shinichi Mochizuki..." that mentioned his name, maybe his talk title and the institution he's from (can't remember exactly.)

  3. He annotated those slides with a magnificent glitter-rainbow-colored pen, adding clarificatory details here and there. But yes, (to my understanding) those notes describe the content of what was said.

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    $\begingroup$ +1 for "magnificent glitter-rainbow-colored pen" $\endgroup$
    – Stopple
    Commented Nov 7, 2020 at 18:21
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    $\begingroup$ Was it recorded? $\endgroup$
    – David Roberts ♦
    Commented Nov 8, 2020 at 11:01
  • $\begingroup$ @DavidRoberts No, it wasn't recorded $\endgroup$
    – kiran
    Commented Nov 8, 2020 at 18:47
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    $\begingroup$ Makes sense. It's not like there's a real pressing need for him to communicate this work or anything.... /s $\endgroup$
    – David Roberts ♦
    Commented Nov 9, 2020 at 0:24
  • $\begingroup$ @DavidRoberts He said that he was planning to record the talk at a later point and upload it to Youtube. $\endgroup$
    – Carlos Esparza
    Commented Nov 13, 2020 at 0:13

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