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• CommentRowNumber1.
• CommentAuthorUrs
• CommentTimeJul 12th 2018

merged some material into this entry. What is actually the original reference? Is it Ehresmann 63 or Bastiani-Ehresmann 74?

• CommentRowNumber2.
• CommentAuthorMike Shulman
• CommentTimeJul 12th 2018

Well, $63\lt 74$

• CommentRowNumber3.
• CommentAuthorUrs
• CommentTimeJul 13th 2018
• (edited Jul 13th 2018)

All right, so I’ll check myself… No, it’s not in that article from 63 that I pointed to (which I got from your article). The term “quintet” is just announced there, with pointer to another article. But it’s not so important, just thought I’d check while I am at it. The world will survive without knowing where Ehresmann noted down this simple idea first.

• CommentRowNumber4.
• CommentAuthorTim_Porter
• CommentTimeJul 13th 2018
• (edited Jul 13th 2018)

In Ehresmann’s collected works there is at no 58: Catégorie double des quintettes; applications covariantes, C.R.A.S. Paris 256 (1963), 1891-1894. Andrée Ehressmann comments on this in the Collected Works.

The paper is in volume III.

• CommentRowNumber5.
• CommentAuthorTim_Porter
• CommentTimeJul 13th 2018

Added link to an earlier source.

• CommentRowNumber6.
• CommentAuthorUrs
• CommentTimeJul 13th 2018

Thanks! So I adjusted the text around the references accordingly.

• CommentRowNumber7.
• CommentAuthorMike Shulman
• CommentTimeJul 13th 2018

Thanks everyone! Maybe I got the “63” reference wrong originally.

• CommentRowNumber8.
• CommentAuthorTim_Porter
• CommentTimeJul 13th 2018

Mike, you did not. He mentions it in the paper to which you referred, but there he refers to the Comptes Rendus paper for more details.

• CommentRowNumber9.
• CommentAuthorUrs
• CommentTimeJul 13th 2018

for more details.

For any details. Unless I am missing something.

• CommentRowNumber10.
• CommentAuthorTim_Porter
• CommentTimeJul 13th 2018

Yes you’re right!

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