p-Jets of Finite Algebras, II: p-Typical Witt Rings
We study the structure of the $p$-jet spaces of the $p$-typical Witt rings of the $p$-adics. We also study the $p$-jets of the comonad map. These data can be viewed as an arithmetic analogue, for the ring $Z$, of the Lie groupoid of the line and hence as an infinitesimal version of the Galois group of $\ Q$ over «$F_1$".
2010 Mathematics Subject Classification: 13 K 05
Keywords and Phrases: Witt vectors
Full text: dvi.gz 49 k, dvi 125 k, ps.gz 380 k, pdf 272 k.
Home Page of DOCUMENTA MATHEMATICA