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DTSTART;TZID=UTC:20260304T153000
DTEND;TZID=UTC:20260304T163000
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CREATED:20260301T133901Z
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UID:8564-1772638200-1772641800@aarms.math.ca
SUMMARY:Atlantic Graph Theory Seminar
DESCRIPTION:Speaker: Andrea Burgess\, University of New Brunswick\nTitle: Colourings of combinatorial designs\n\nAbstract: A combinatorial design is a pair $(V\,\mathcal{B})$ where $V$ is a nonempty set of points\, and $\mathcal{B}$ is a collection of subsets of $\mathcal{B}$\, called blocks.  A $c$-colouring of a design $(V\,\mathcal{B})$ is a function $f:V \rightarrow C$\, where $C$ is a set of $c$ colours\, such that each block contains at least two points of different colours.  The design’s chromatic number is the least value of $c$ for which it admits a $c$-colouring.  While colourings of balanced incomplete block designs and cycle systems have been extensively studied\, relatively little is known regarding colourings of designs with restricted structural properties\, such as resolvability\, or colourings of certain other classes of designs\, such as group divisible designs.  In this talk\, we aim to bridge this gap.\n\nWe start by considering colourings of Kirkman triple systems (KTS)\, which are resolvable Steiner triple systems.  We show that there is a $3$-chromatic KTS$(v)$ if and only if $v \equiv 3$~(mod~$6$)\, and construct infinite families of $c$-chromatic KTS$(v)$ for every integer $c \geq 4$.\n\nWe then extend the study of colourings to group divisible designs (GDDs).  In a GDD\, the points are partitioned into groups; no block contains more than one point from any group\, but each pair of points not in the same group appears in exactly $\lambda$ blocks.  We consider the existence of uniform GDDs with arbitrary group size and arbitrary chromatic number $c$\, and further discuss colourings of GDDs with additional restrictions on the colours appearing in each group.\n\nIf time permits\, we will mention some results on equitable colourings of group divisible designs and packing designs; in this type of colouring\, each colour must appear an equal number of times (or as closely as possible) in each block.\n\nThis talk contains joint work with Nicholas Cavenagh\, Peter Danziger\, Diane Donovan\, Tara Kemp\, James Lefevre\, David Pike and E. \c{S}ule Yaz{\i}c{\i}.\n\n\nZoom link:\nhttps://us02web.zoom.us/j/88013261876?pwd=XGocyHqvseXY8metPztPoSuulEEejX.1\n\nMeeting ID: 880 1326 1876\nPasscode: 357963
URL:https://aarms.math.ca/event/atlantic-graph-theory-seminar-39/
LOCATION:Online via Zoom
CATEGORIES:AARMS Atlantic Graph Theory Seminar
ORGANIZER;CN="jeannette Janssen":MAILTO:jeannette.janssen@dal.ca
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20260314
DTEND;VALUE=DATE:20260315
DTSTAMP:20260610T172204
CREATED:20260204T125958Z
LAST-MODIFIED:20260212T104704Z
UID:8509-1773446400-1773532799@aarms.math.ca
SUMMARY:Girls STEM UP 2026: The Future in Focus
DESCRIPTION:Girls STEM Up Conference 2026 is the first conference of its kind in Atlantic Canada\, dedicated to empowering future female leaders in science\, technology\, engineering\, and mathematics. Taking place in March 2026\, this eighth annual conference will welcome 300+ delegates from high schools\, universities\, and the wider community who are passionate about advancing women’s representation in STEM. Through inspiring keynote speakers\, interactive workshops\, and meaningful networking opportunities\, the conference creates an inclusive space to spark conversations about barriers women face in STEM and to celebrate innovation\, ambition\, and diverse perspectives. Girls STEM Up aims to inspire confidence\, foster collaboration\, and equip attendees with the tools and connections needed to thrive in STEM fields.
URL:https://aarms.math.ca/event/girls-stem-up-2026-the-future-in-focus/
LOCATION:Fredericton Convention Centre\, 670 Queen Street\, Fredericton\, New Brunswick\, E3B 1C2\, Canada
CATEGORIES:AARMS sponsored events
ORGANIZER;CN="Marissa Thebeau":MAILTO:marissa.thebeau@unb.ca
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20260314
DTEND;VALUE=DATE:20260315
DTSTAMP:20260610T172204
CREATED:20260204T132759Z
LAST-MODIFIED:20260204T132759Z
UID:8528-1773446400-1773532799@aarms.math.ca
SUMMARY:Pi Day/International Day of Math 2026: Math and Hope
DESCRIPTION:March 14 is celebrated as Pi Day/International Day of Mathematics. The theme this year is “Math and Hope”. This outreach event is open to the general public\, especially families. We want to celebrate the fun\, beauty\, and creativity of math. There will be displays and hands-on activities along with math take-home hits. We will also have pies to eat!
URL:https://aarms.math.ca/event/pi-day-international-day-of-math-2026-math-and-hope/
LOCATION:People’s Place Library\, Antigonish\, 283 Main St Room 123\, Antigonish\, Nova Scotia\, B2G 2C3\, Canada
CATEGORIES:AARMS outreach events
ORGANIZER;CN="Tara Taylor":MAILTO:ttaylor@stfx.ca
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