[Paris, Presses Universitaires de France, 1966]. 4to. In the original stapled blank blue printed wrappers. Offprint from ""Institut des Hautes Études Scientifiques. Publications Mathématiques"" No. 29. Light wear to extrimities, otherwise fine and clean. Pp. 95-103, (1).
Reference : 48369
Scarce offprint issue of Grothendieck's seminal paper in which he founded crystalline cohomology. He introduced crystalline cohomology to study the p-torsion part of the cohomology of characteristic p varieties. In the crystalline topology which is the basis of this theory, covering maps are given by infinitesimal thickenings together with divided power structures. The crystalline covers of a fixed scheme form a category with no final object.
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