Maximally symmetric stable curves
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We give a sharp bound on the number of automorphisms of a stable curve of a given genus and describe all curves attaining this bound.
16 pages. v2 corrects an error in the Main Theorem and several typos. v3 fixes a gap in the proof and corrects more typos
16 pages. v2 corrects an error in the Main Theorem and several typos. v3 fixes a gap in the proof and corrects more typos