In this paper we give a few discrete versions of Robert Accola’s results on Riemann surfaces with automorphism groups admitting partitions. As a consequence, we establish a condition for $$\gamma $$ γ -hyperelliptic involution on a graph to be unique. Also we construct an infinite family of graphs with more than one $$\gamma $$ γ -hyperelliptic involution.
Analysis and Mathematical Physics – Springer Journals
Published: Jul 25, 2016