Geodesic
P-jets of finite algebras. II: $p$-typical Witt rings
Documenta mathematica, Tome 18 (2013), pp. 971-996.

Voir la notice de l'article provenant de la source Electronic Library of Mathematics

Summary: 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 «$F_1$".
Classification : 13, K, 05
Keywords: Witt vectors 
@article{DOCMA_2013__18__a20,
     author = {Buium, Alexandru},
     title = {P-jets of finite algebras. {II:} $p$-typical {Witt} rings},
     journal = {Documenta mathematica},
     pages = {971--996},
     publisher = {mathdoc},
     volume = {18},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_2013__18__a20/}
}
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Buium, Alexandru. P-jets of finite algebras. II: $p$-typical Witt rings. Documenta mathematica, Tome 18 (2013), pp. 971-996. http://geodesic.mathdoc.fr/item/DOCMA_2013__18__a20/