ARS MATHEMATICA CONTEMPORANEA
Editoral
The present issue of Ars Mathematica Contemporánea contains a selection of articles related to the topics presented at the International Conference on Graph Theory and Combinatorics, held form 1 to 3 May 2013, in Koper. The conference was organised in honour of Professor Dragan Marušic on the occasion of his 60th birthday. It brought together many of the researchers with whom Dragan's discussions on mathematics have been (and still are) the most enjoyable and fruitful.
There were 14 invited talks at the conference, covering some of Dragan's favourite topics related to symmetries of graphs and other combinatorial structures, such as the hamil-tonicity problem in vertex-transitive graphs and the polycirculant conjecture.
The 15 articles in this special issue of Ars Mathematica Contemporanea have been selected for publication after the same thorough refereeing process that papers go through for regular issues of this journal. We are convinced that these high quality articles will have a great impact, and will positively influence future research on the topics concerned.
Klavdija Kutnar, Štefko Miklavic, Tomaž Pisanski and Primož Šparl
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