Cheryl E Praeger

The crux of a card trick performed with a deck of cards usually depends on understanding how shuffles of the deck change the order of the cards. By understanding which permutations are possible, one knows if a given card may be brought into a...

The talk is about finite connected 4-valent graphs admitting an edge-transitive and vertex-transitive subgroup \(G\) of automorphisms which preserves an orientation of the edges. But I will first talk about the general approach to describing families...