‎"GROTHENDIECK, A.‎
‎On the de Rham Cohomology of Algebraic Varieties. - [THE FOUNDATION OF CRYSTALLINE COHOMOLOGY]‎

‎[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.‎