# István Kovács: Automorphism groups of circulant graphs

Date of publication: 31. 10. 2008

Mathematics colloquium

Četrtek, 6. 11. 2008, ob 18.15 v predavalnici 2.02 na Jadranski 21.

A circulant graph Γ is a Cayley graph over a cyclic group *C*_{n}. In the talk we consider the automorphism groups of such graphs. We present a description of Aut Γ in terms of generalized wreath products in the special case when Γ has rational spectrum. We also give a formula estimating the total number of groups Aut Γ that Γ has order *n* = 2^{t}.

Doc. dr. István Kovács

Univerza na Primorskem, FAMNIT