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The Department this week
NS Math Circles Event
December 7, 2016 6:30 PM
Presented by : Dr. Karl Dilcher
Topic : How did we calculate before there were calculators?
Electronic calculators didn't become widely available until the early to mid-1970s. Before that, it was slide rules and logarithmic tables that played similar roles as do pocket calculators today, at least in high schools and universities.
In this session I will present some of the history of log tables and slide rules, along with some of the underlying theory. We will also do practical examples with actual log tables and with simple paper slide rules. Every participant will receive an old Dalhousie booklet of mathematical tables, including log tables, to take home.
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.
Number Theory Seminar
December 8, 2016 2:30 PM
Speaker: Johannes Schleischitz, University of Ottawa
Title: Classical exponents of Diophantine approximation
Abstract: This talk is about approximation to successive powers of a real number by rational numbers with the same denominator. The quality of the approximation is compared to the size of the denominator. We also study several variations of the above problem, in terms of classical exponents of Diophantine approximation. We discuss open questions like Wirsing's problem concerning approximation to real numbers by algebraic numbers of degree at
most n, for a given integer n.