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January 17, 2017 2:30 PM
Presented by : Dorette Pronk Dalhousie
Topic : Bicategories of Fractions Revisited (continued)
Abstract: Motivated by questions about mapping spaces for orbifolds, we revisit the the bicategories of fractions conditions and construction. (I will give both in detail.) In particular, in this talk we will present a weaker set of conditions on the class of arrows to be inverted, and we will present a canonical form for the 2-cell diagrams using the pseudo pullbacks. This presentation makes horizontal composition much simpler than in the general case.
Math Circles Event
January 18, 2017 6:30 PM
Presented by : Asmita Sodhi
Title : Alice’s Adventures in Numberland
Charles Lutwidge Dodgson, better known as Lewis Carroll, was an Oxford mathematician and the author of Alice’s Adventures in Wonderland. This children’s classic recently celebrated its 150th birthday and is full of the riddles and rhymes (and nonsense!) that Dodgson loved so much, but also more math than you may realize. In this session we’ll take a trip with Alice down the rabbit hole and through Wonderland, discovering some of the mathematics hidden there along the way!
Pizza and pop will be served. To give us accurate numbers for food orders, we ask that you RSVP to firstname.lastname@example.org. An overview of all events for this year can be found on our website,http://www.nsmathcircles.com/EventsCurrent.html. Bring your friends, classmates, students, or anyone else who might be interested.