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Difference equations with semisimple Galois groups in positive characteristic

Maier, AnnettePublikationsserver der RWTH Aachen University2011

… Picard-Vessiot ring, one can assign a difference Galois group to the Picard-Vessiot ring, which turns out to be a linear algebraic group (in the scheme theoretic sense). Let F = F_q(s,t) with sigma defined to be the automorphism that fixes F_q(t) pointwise and maps s to s^q. The main result of …

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