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math.AG2019★ 2 cited
Local Oort groups and the isolated differential data criterion
Huy Dang, Soumyadip Das, Kostas Karagiannis +2
It is conjectured that if k is an algebraically closed field of characteristic p > 0, then any branched G-cover of smooth projective k-curves where the "KGB" obstruction vanishes a…
math.NT2019
Upper Ramification Groups for Arbitrary Valuation Rings
Kazuya Kato, Vaidehee Thatte
T. Saito established a ramification theory for ring extensions locally of complete intersection. We show that for a Henselian valuation ring with field of fractions and for…