Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4583600 | Journal of Algebra | 2017 | 26 Pages |
Abstract
If G is a group of automorphisms of a compact Klein surface X, then the direct product GÃC2 is a group of automorphisms of the Riemann double cover X+ of X. In this paper we analyse the relationship between G and the full groups of automorphisms Aut(X) and Aut(X+) of X and X+ respectively, in the special case where the group G is uniformised by a non-Euclidean crystallographic group with quadrangular signature (2,2,2,n). There is a difference in what happens between bordered surfaces and unbordered non-orientable surfaces, and so we consider those cases separately (including the special situation for n=4 in the unbordered case).
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
E. Bujalance, F.J. Cirre, M.D.E. Conder,