Abstract
Another proof of Greenberg's theorem on automorphism groups of compact \mboxRiemann surfaces is given. Using the idea of the proof, the equivalence problem for finite Galois coverings of the compact projective line is answered affirmatively, except special type of coverings.
Citation
Satoru Mizuta. Makoto Namba. "Greenberg's theorem and equivalence problem on compact Riemann surfaces." Osaka J. Math. 43 (1) 137 - 178, March 2006.
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