Abstract (EN):
In this paper we give a non-computer-assisted proof of the following result: if G is an even transitive group of degree 11 and has a string C-group representation with rank r ¿ {4, 5} then G ~= PSL2(11). Moreover this string C-group is the group of automorphisms of the rank 4 polytope known as the 11-cell. The insights gained from this case study include techniques and observations concerning permutation representation graphs of string C-groups. The foundational lemmas yield a natural and intuitive understanding of these groups. These and similar approaches can be replicated and are applicable to the study of other transitive groups. © 2024 University of Primorska. All rights reserved.
Language:
English
Type (Professor's evaluation):
Scientific