Cohomology of Drinfeld symmetric spaces and Harmonic cochains

Details Cohomology of Drinfeld symmetric spaces and Harmonic cochains Cohomology of Drinfeld symmetric spaces and Harmonic cochains

2004-09-09

arxiv.org/abs/math/0409149v1

Annales de L'Institut Fourier, 56 (2006), n. 3, p. 561-597

Mathematics

Group Theory

Scientific paper

Let K be a non-archimedean local field. This paper gives an explicit isomorphism between the dual of the special representation of GL_{n+1}(K)$and the space of harmonic cochains defined on the Bruhat-Tits building of GL_{n+1}(K), the definition of harmonic cochains is in the sense of E. de Shalit [Residues on buildings and de Rham cohomology of p-adic symmetric domains, Duke Math. J., 106, 123-191, (2000)]. We deduce, applying a work of P. Schneider and U. Stuhler, [The cohomology of p-adic symmetric spaces, Inv. Math. 105, 47-122, (1991)], that for K of any characteristic, there exists a GL_{n+1}(K)-equivariant isomorphism between the cohomology group of the Drinfeld symmetric space and the space of harmonic cochains.

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