Department of Mathematics and Computer Science
Number Theory and Combinatorics Seminar
Spring 2017
Talks are at noon on Monday in room B660 of University Hall
For more information, or to receive an email announcement of each week's seminar,
contact Nathan Ng < ng AT cs DOT uleth DOT ca > or Dave Morris <>.
                The next talk:

April 3    
at noon
in B660
Amir Akbary Elliptic sequences
An elliptic sequence is a solution over an arbitrary integral domain of the recursion $$W_{m+n}\, W_{m-n} \, = \, W_{m+1}\, W_{m-1}\, W_{n}^{2} - W_{n+1}\, W_{n-1}\,W_{m}^{2}, $$ where $m, n \in \mathbb{Z}$. The theory of integral elliptic sequences was developed by Morgan Ward in 1948. We describe the fundamental classification theorem of Ward for these sequences. Our emphasis will be on the so called "singular" sequences and their relation to the classical Lucas sequences.
Talks in the series this semester:
(Click on any title for more info, including the abstract. Then click on it again to hide the info.)

Date Speaker Title

Jan 9 Darcy Best Transversals in Latin Arrays with many Symbols
(Monash University, Australia)

Jan 16 everyone Open problem session

Jan 23 Alia Hamieh Non-Vanishing of Central Values of Rankin-Selberg $\boldsymbol{L}$-Functions

Jan 30 Nathan Ng A subconvexity bound in the $\boldsymbol{t}$-aspect for degree two L-functions

Feb 6 Joy Morris Oriented Regular Representations

Feb 13 Habiba Kadiri Explicit results in prime number theory

Feb 27 Dave Morris Modern approach to the Traveling Salesman Problem

Mar 6 Hadi Kharaghani An association scheme for twin prime powers

Mar 13 Forrest J. Francis Special Values Of Euler's Function

Mar 27 Sahar Siavashi On the Solutions of Certain Congruences

Apr 3 Amir Akbary Elliptic Sequences

Past semesters: Fall F2007 F2008 F2009 F2010 F2011 F2012 F2013 F2014 F2015 F2016
Spring S2008 S2009 S2010 S2012 S2013 S2014 S2015 S2016
Click here for a PDF file of abstracts of all talks back to 2007 (approx 225K).