On a general difference Galois theory II

Morikawa, Shuji; Umemura, Hiroshi

Annales de l'Institut Fourier, Volume 59 (2009) p. 2733-2771

On a general difference Galois theory I

Morikawa, Shuji

Annales de l'Institut Fourier, Volume 59 (2009) p. 2709-2732