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math.CO2020
Classifying edge-biregular maps of negative prime Euler characteristic
Olivia Jeans, Jozef Širáň
An edge-biregular map arises as a smooth normal quotient of a unique index-two subgroup of a full triangle group acting with two edge-orbits. We give a classification of all finite…
math.GR2020
Characters of twisted fractional linear groups
Soňa Pavlíková, Jozef Širáň
We determine character tables for twisted fractional linear groups that form the `other' family in Zassenhaus' classification of finite sharply 3-transitive groups.