# Status of local Langlands conjecture over positive characteristic

I am interested to know what the status of Local Langlands Conjectures in positive characteristic is? By a positive characteristic local field, I mean a field of the form $\mathbb{F}_q((t))$.

A nice summary of what is known for characteristic zero local fields is given in the first paragraph of

http://arxiv.org/pdf/1204.0132v2.pdf

I'm looking for a similar description in the positive characteristic case.

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Why do you not consider ${\mathbf F}_q((t))$ to be a positive characteristic local field, where $q$ is a prime power but not necessarily prime? Do you consider finite extensions of ${\mathbf Q}_p$ to be local fields of characteristic 0? –  KConrad Feb 4 '14 at 23:06
Sorry, that was a typo. It is correct now. Thanks. –  Dr. Evil Feb 4 '14 at 23:39

## 1 Answer

I am not an expert, but what I think I know on the subject is: For $GL_n$, the local Langlands conjecture has long been known by work of Laumon, Rapoport and Stuhler (Inventiones Math, 1993). Of course, in this case, even the global correspondence is now known, due to the Fields-Medal-winning work of Laurent Lafforgue.

For general reductive groups, the local Langlands correspondence is not known at this date but there is movement right now. Vincent Lafforgue (Laurent's younger brother) has recently released a paper proving the direction "automorphic --> Galois" of the global correspondence. In this paper, he announces a work in preparation of himself and Genestier aiming at establishing the local Langlands correspondence for reductive groups. So when this paper is released, the answer to your question may well be "solved!".

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Laumon pas Laumont! –  Laurent Berger Feb 6 '14 at 8:16
Ah oui désolé Lauren :-) Non sérieusement je change... –  Joël Feb 6 '14 at 13:28