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DTSTART;TZID=UTC:20201104T153000
DTEND;TZID=UTC:20201104T163000
DTSTAMP:20201108T225743Z
CREATED:20201006T115021Z
LAST-MODIFIED:20201108T225743Z
UID:5569-1604503800-1604507400@aarms.math.ca
SUMMARY:Atlantic Graph Theory Seminar:  Dr Andrea Burgess (University of New Brunswick\, Saint John)
DESCRIPTION:Equitably colourable cycle decompositions\n A -colouring of a decomposition of a graph  is an assignment of  colours to the vertices of . A colouring is equitable if each colour is represented (as closely as possible) an equal number of times on each block\, i.e. for any two colours  and \, the number of vertices of colour  and  in any given block differ by at most 1. In this talk\, we give an overview of colourings of designs and cycle decompositions\, and present some recent joint results with Francesca Merola on the existence of equitably 2-colourable cycle decompositions of the cocktail party graph. In particular\, we give a complete existence result for equitably 2-colourable -cycle decompositions of  in various cases\, including that  or  (mod );  is a power of 2;  for  a prime power; or . \nThe Atlantic Graph Theory Seminar series will take place every Wednesday from 3:30-4:30 ADT online via zoom. The talks\, provided by researchers\, postdocs and graduate students\, will be on a variety of current topics in graph theory. If you would like to give a talk or attend\, please email one of the organizers (Jason Brown and Danielle Cox).
URL:https://aarms.math.ca/event/atlantic-graph-theory-seminar-2020-11-04/
LOCATION:Zoom seminar
CATEGORIES:Atlantic Graph Theory Seminar
ORGANIZER;CN="Jason Brown":MAILTO:jason.brown@dal.ca
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BEGIN:VEVENT
DTSTART;TZID=UTC:20201118T153000
DTEND;TZID=UTC:20201118T163000
DTSTAMP:20201108T230211Z
CREATED:20201006T115021Z
LAST-MODIFIED:20201108T230211Z
UID:5573-1605713400-1605717000@aarms.math.ca
SUMMARY:Atlantic Graph Theory Seminar: Kyle MacKeigan (PhD Candidate\, Dalhousie University)
DESCRIPTION:Orthogonal Colourings of Graphs\nTwo colourings of a graph are orthogonal if they have the property that when two vertices receive the same colour in one colouring\, then those vertices receive distinct colours in the other colouring. In this talk\, the importance of perfect orthogonal colourings is demonstrated. Then\, perfect orthogonal colourings of Cayley graphs and tree graphs are constructed. To conclude\, it is shown how the Cartesian\, tensor\, and strong graph product can be used to generate perfect orthogonal colourings. \nThe Atlantic Graph Theory Seminar series will take place every Wednesday from 3:30-4:30 ADT online via zoom. The talks\, provided by researchers\, postdocs and graduate students\, will be on a variety of current topics in graph theory. If you would like to give a talk or attend\, please email one of the organizers (Jason Brown and Danielle Cox).
URL:https://aarms.math.ca/event/atlantic-graph-theory-seminar-2020-11-18/
LOCATION:Zoom seminar
CATEGORIES:Atlantic Graph Theory Seminar
ORGANIZER;CN="Jason Brown":MAILTO:jason.brown@dal.ca
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20201125T153000
DTEND;TZID=UTC:20201125T163000
DTSTAMP:20201231T162125Z
CREATED:20201006T115021Z
LAST-MODIFIED:20201231T162125Z
UID:5664-1606318200-1606321800@aarms.math.ca
SUMMARY:Atlantic Graph Theory Seminar: Dr Jared Howell (Memorial University of Newfoundland\, Grenfell Campus)
DESCRIPTION:Gracefully labelling windmills using Skolem-like sequences\nTo gracefully label a graph G\, assign each vertex v ∊ V(G) a distinct label l(v) from {0\,1\,2\,…\,|E(G)|}\, such that {|l(u)-l(v)| : uv ∊ E(G)}={1\,2\,3\,…\,|E(G)|}. In this talk we will examine constructive techniques using Skolem-like sequences to gracefully label windmills of cycles. This includes new constructive techniques for known results as well as new results on windmills with vanes of mixed cycle length. \nThe Atlantic Graph Theory Seminar series will take place every Wednesday from 3:30-4:30 ADT online via zoom. The talks\, provided by researchers\, postdocs and graduate students\, will be on a variety of current topics in graph theory. If you would like to give a talk or attend\, please email one of the organizers (Jason Brown and Danielle Cox).
URL:https://aarms.math.ca/event/atlantic-graph-theory-seminar-2020-11-25/
LOCATION:Zoom seminar
CATEGORIES:Atlantic Graph Theory Seminar
ORGANIZER;CN="Jason Brown":MAILTO:jason.brown@dal.ca
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