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1. • CommentRowNumber1.
   • CommentAuthorMike Shulman
   • CommentTimeNov 18th 2016
   • PermaLink
   Author: Mike Shulman
   Format: MarkdownItexDoes anyone have a copy of a paper by Penon called "Topologie et intuitionnisme" or know where it can be found? I've seen it cited in a few places, but I can't even find it listed in MathSciNet.

   Does anyone have a copy of a paper by Penon called “Topologie et intuitionnisme” or know where it can be found? I’ve seen it cited in a few places, but I can’t even find it listed in MathSciNet.

2. • CommentRowNumber2.
   • CommentAuthorDavidRoberts
   • CommentTimeNov 18th 2016
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   Author: DavidRoberts
   Format: MarkdownItexSounds like something that old guard on the categories mailing list would have.

   Sounds like something that old guard on the categories mailing list would have.

3. • CommentRowNumber3.
   • CommentAuthorRichard Williamson
   • CommentTimeNov 18th 2016
   • (edited Nov 18th 2016)
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   Author: Richard Williamson
   Format: MarkdownItexGoogling it, as you no doubt did as well, it appears to be a pre-print, which might explain why it is not in MathSciNet. Specifically, it seems to be from the series 'Prépublications Mathématiques de l'Université Paris-Nord'. The universities in Paris have changed structure over the years, but I would expect that it is still archived in a library in Paris, probably at Paris 13. You could try asking one of these [members](https://www.math.univ-paris13.fr/laga/index.php/fr/ta/membres) of the algebraic topology group there to take a look, and copy it for you. Failing that, I'd try Andrée Ehresmann, who I think would know where to obtain it. If you get hold of it, I'd be very happy to have a copy :-).

   Googling it, as you no doubt did as well, it appears to be a pre-print, which might explain why it is not in MathSciNet. Specifically, it seems to be from the series ’Prépublications Mathématiques de l’Université Paris-Nord’. The universities in Paris have changed structure over the years, but I would expect that it is still archived in a library in Paris, probably at Paris 13. You could try asking one of these members of the algebraic topology group there to take a look, and copy it for you.

   Failing that, I’d try Andrée Ehresmann, who I think would know where to obtain it.

   If you get hold of it, I’d be very happy to have a copy :-).

4. • CommentRowNumber4.
   • CommentAuthorMike Shulman
   • CommentTimeNov 19th 2016
   • PermaLink
   Author: Mike Shulman
   Format: MarkdownItexWell, I've now found Penon's thesis online [here](http://www.numdam.org/numdam-bin/item?id=DIA_1985__S13__1_0), in which Chapter III probably contains everything I hoped to learn from Topologie et intuitionnisme. So I probably won't try further to track it down.

   Well, I’ve now found Penon’s thesis online here, in which Chapter III probably contains everything I hoped to learn from Topologie et intuitionnisme. So I probably won’t try further to track it down.

5. • CommentRowNumber5.
   • CommentAuthorTim_Porter
   • CommentTimeNov 19th 2016
   • (edited Nov 19th 2016)
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   Author: Tim_Porter
   Format: MarkdownItexThe obvious thing to do was to ask Jacques himself! https://webusers.imj-prg.fr/~jacques.penon/

   The obvious thing to do was to ask Jacques himself!

   https://webusers.imj-prg.fr/~jacques.penon/