Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Le lemme fondamental pour l'endoscopie tordue: le cas o{\`u} le groupe
  endoscopique non ramifi{\'e} est un tore   We prove the fundamental lemma for twisted endoscopy, for the unit elements
of the spherical Hecke algebras, in the case of a non ramified elliptic endo-
scopic datum whose underlying group is a torus. This implies that the
fundamental lemma for twisted endoscopy is now proved, for all elements in the
spherical Hecke algebras, in characteristic zero and any residue
characteristic.

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The categories of this paper are: astro-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
3
The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: econ
30
The categories of this paper are: q-alg