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There exist unpublished notes on correspondences of von Neumann algebras due to Connes. This is often cited, but I've never seen a copy. It would be nice to have this, say, to maybe look further into the point of view discussed in his book Noncommutative geometry. Particularly, the stuff involving half-densities.

Does anyone have a scanned copy of this they wouldn't mind sending/posting a link to?

Thanks, in advance!

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1 Answer 1

Aren't you thinking of Popa's unpublished manuscript on Correspondences, available on his website: http://www.math.ucla.edu/~popa/popa-correspondences.pdf

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Thanks, Alain! I do, in fact, mean unpublished notes of Connes, though. I wonder if Sorin Popa would have a copy of these? –  Jon Bannon Apr 29 '11 at 11:30
    
I see. These might be handwritten notes by Connes, dated 1980, right? I don't have them. Most probably Sorin has a copy, or Dima, or Claire Anantharaman-Delaroche... –  Alain Valette Apr 29 '11 at 12:01
    
Yes, these are the notes I'm referring to. –  Jon Bannon Apr 29 '11 at 12:24
    
I wonder if these notes more or less are contained in Connes's book? I have never seen the notes, so I don't know. –  Jon Bannon Apr 29 '11 at 12:25

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