Abstract
I discuss four unpublished letters of Deligne (one on Hodge theory, two on Euler–Poincaré characteristics and ramification of \({\ell}\)-adic sheaves, one on generalized divisors), and sketch some of the developments they generated.
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Communicated by: Takeshi Saito
A talk given on October 5, 2013, at the event Celebrating the Mathematics of Pierre Deligne, IHÉS and the Simons Foundation, New York.
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Illusie, L. From Pierre Deligne’s secret garden: looking back at some of his letters. Jpn. J. Math. 10, 237–248 (2015). https://doi.org/10.1007/s11537-015-1514-9
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DOI: https://doi.org/10.1007/s11537-015-1514-9
Keywords and phrases
- mixed Hodge theory
- \({\ell}\)-adic sheaf
- ramification
- Swan conductor
- Euler–Poincaré characteristic
- characteristic cycle
- logarithmic structure