Adjoint groups over ℚ_{𝕡}(𝕏) and R-equivalence - revisited

Preeti, R.; Soman, A.

doi:10.1090/proc/13304

Adjoint groups over ${\mathbb Q}_p (X)$ and R-equivalence - revisited
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Proc. Amer. Math. Soc. 145 (2017), 1019-1029 Request permission

Abstract:

We obtain a class of examples of non-rational adjoint classical groups of type $^2A_n$ and a group of type $^2D_3$ over the function field $F$ of a smooth geometrically integral curve over a $p$-adic field with $p \neq 2$. We also show that for any group of type $C_n$ over $F$, the group of rational equivalence classes of $G$ over $F$ is trivial, i.e., $G(F)/R=(1)$.

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