Correspondance de Jacquet-Langlands pour les corps locaux de   caract\'eristique non nulle
  We prove the Jacquet-Langlands local correspondence in non-zero characteristic, using the proof by Deligne, Kazhdan and Vign\'eras for the zero characteristic case and the theory of closed fields of Kazhdan. We also prove the orthogonality relations for an inner form of $GL_n$ in non-zero characteristic. 
Alexandru Ioan Badulescu