A De Rham–Witt approach to crystalline rational homotopy theory
We give a definition of the crystalline fundamental group of suitable log schemes in positive characteristic using the techniques of rational homotopy theory applied to the De Rham–Witt complex.(Received February 11 2002)
(Accepted June 6 2003)
Key Words: De Rham–Witt complex; bar complex; crystalline cohomology.