Abstract
A global analog of Fontaine’s category of triples is introduced. While the latter is antiequivalent to the category of formal group laws over the ring of Witt vectors over a finite field of characteristic p, the introduced category is antiequivalent to the category of formal group laws over Explicit constructions of kernels and cokernels in this category are given, thus proving that it is pre-abelian.
1991 Mathematics Subject Classification: