Department of Mathematics and Computer Science  
Number Theory and Combinatorics Seminar  
Fall 2022  
For more information,
contact
Félix Baril Boudreau
<felix.barilboudreau@uleth.ca>
or Bobby Miraftab <Bobby.Miraftab@uleth.ca>. Talks are usually at noon on Monday in room M1040 (Markin Hall). All times are Mountain Time.  
The live access zoom link is available here and on researchseminars.org, and also sent to our mailing list. 
The next talk:  


Sep 26
at noon in M1040 
DangKhoa Nguyen
(University of Calgary) 
Height gaps for coefficients of Dfinite power series
A power series $f(x_1,\ldots,x_m)\in \mathbb{C}[[x_1,\ldots,x_m]]$ is said to be Dfinite if all the partial derivatives of $f$ span a finite dimensional vector space over the field $\mathbb{C}(x_1,\ldots,x_m)$. For the univariate series $f(x)=\sum a_nx^n$, this is equivalent to the condition that the sequence $(a_n)$ is Precursive meaning a nontrivial linear recurrence relation of the form: $$P_d(n)a_{n+d}+\cdots+P_0(n)a_n=0$$ where the $P_i$'s are polynomials. In this talk, we consider Dfinite power series with algebraic coefficients and discuss the growth of the Weil height of these coefficients. This is from a joint work with Jason Bell and Umberto Zannier in 2019 and a more recent work in June 2022. 
Click on any title for more info, including the abstract. Then
click on it again to hide the info.
When available, click on the mathtube icon to access a videorecording of the talk. 
Date  Speaker  Title  


Sep 12  everyone  Organizational meeting and problem session  


no seminar on September 19 (University Holiday)  


Sep 26  DangKhoa Nguyen  Height gaps for coefficients of Dfinite power series  
(University of Calgary)  


Oct 3  Debanjana Kundu  Title TBA  
(University of British Columbia)  


no seminar on October 10 (Thanksgiving)  


Oct 17  Elchin Hasanalizade  Title TBA  


Oct 24  Speaker TBA  Title TBA  


Oct 31  Hugo Chapdelaine  Title TBA  
via zoom  (Université Laval)  


no seminar on November 7 (Reading Week)  


Nov 14  Julie Desjardins  Title TBA  
via zoom  (University of Toronto)  


Nov 21  Solaleh Bolvardizadeh  Title TBA  


Nov 28  Mathieu Dutour  Title TBA  
(University of Alberta)  


Dec 5  Alexandra Florea  Title TBA  
via zoom  (University of California  Irvine)  

Past semesters:  Fall  F2007  F2008  F2009  F2010  F2011  F2012  F2013  F2014  F2015  F2016  F2017  F2018  F2019  F2020  F2021 
Spring  S2008  S2009  S2010  S2012  S2013  S2014  S2015  S2016  S2017  S2018  S2019  S2020  S2021  S2022 
Click here for a PDF file of abstracts of all talks back to 2007 (approx 425K). 