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Added a reference
Just wondering, but is this concept obviously to be seen as especially related to ’algebraic geometry’?
See the range of tags on MathOverflow questions about Hopf-Galois extensions here.
I’ve seen the article
cited or alluded to in a couple of places, yet I’ve been unable to locate it beyond this page. Did it end up getting published under a different title?
No, it consists of 4 LaTeX manuscripts, 2 written by me and 2 by Gabi (all in 2011) and never fully completed. I will probably get back to complete those in next academic year; Gabi has left mathematics 4 years ago or so. There is a complementary work I have done with Martina Stojić at IHES in Fall 2019, and we have two additional manuscripts on those (70 pages total); Martina have had several other papers which we preferred to finish first as simpler (in a different topic of Hopf algebroids), 2 appeared last year and one will appear this or next month, thus next year is reserved for all of those left out (I hope also something will appear in a work of my PhD student who is writing something related). I gave related talks to works with Gabi and with Martina on globalized Hopf-Galois extensions recently including in Srni and another one will be in Bologna on April 8 (online attendance is possible), the two last talks mentioned are shorter (30 and 40 minutes resp.).
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