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SEMINAR: Groups and Combinatorics Seminar: Vertex-primitive digraphs having vertices with almost equal neighbourhoods

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Today's date is Monday, July 06, 2020
Groups and Combinatorics Seminar: Vertex-primitive digraphs having vertices with almost equal neighbourhoods Other events...
Time and place: 15:00 Friday 27 March in Weatherburn LT.

Speaker: Gabriel Verret (University of Western Australia)

Title: Vertex-primitive digraphs having vertices with almost equal neighbourhoods.

Abstract: Apart from some very trivial examples, a vertex-primitive digraph cannot have two vertices with equal neighbourhoods. (This is an easy exercise.) The first non-trivial case is thus when a vertex-primitive digraph has two vertices with neighbourhoods differing by one. I will give a proof of the classification of such digraphs, and describe a more general result and some applications.
Contact Gabriel Verret <[email protected]>
Start Fri, 27 Mar 2015 15:00
End Fri, 27 Mar 2015 16:00
Submitted by Gabriel Verret <[email protected]>
Last Updated Wed, 25 Mar 2015 09:29
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