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Nov 25, 2020 at 15:46 comment added BenicioLima Dear @F_L is the claim that a birational automorphism of a variety induces an automorphism of the canonical ring something general? Also, is it true that an automorphism on the canonical ring of a variety induces an automorphism on the variety? (at least if the variety has ample canonical class) I would really appreciate a reference for these assertions. Thank you.
Nov 5, 2013 at 12:24 history answered Puzzled CC BY-SA 3.0