# Queen's University - Department of Mathematics and Statistics

 Wednesday, June 14 Number Theory Seminar Time: 11:00 a.m. Place: Jeffery 422 Speaker: François Seguin Title: Towards positive density of quartic polynomials yielding extensions of class number one Abstract Attached Thursday, June 15 Curves Seminar Time: 1:30 p.m. Place: Jeffery 422 Speaker: Mike Roth Title: Examples IV Abstract Attached

Items for the Info Sheet should reach Anne ( burnsa@queensu.ca) by noon on Monday. The Info Sheet is published every Tuesday.

Wednesday, June 14, 11:00 a.m. Jeffery 422 - Number Theory Seminar

Speaker: François Seguin

Title: Towards positive density of quartic polynomials yielding extensions of class number one

Abstract: Given a polynomial over a finite field, we can define a quadratic extension of the function field $F_q(t)$, and ask how often those have class number one. During this talk, we will focus on the case where the polynomials are of degree 4, present some previous results about this question, and outline an unpublished proof by R. Murty and R. Gupta suggesting positive density of such polynomials.

Thursday, June 15, 1:30 p.m. Jeffery 422 - Curves Seminar

Speaker: Mike Roth

Title: Examples IV

Abstract: We will finish the example of d points in P^1, up to projective automorphisms.

### Contact Info

 Department of Math & Stats Jeffery Hall, 48 University Ave. Kingston, ON Canada, K7L 3N6 Phone: (613) 533-2390 Fax: (613) 533-2964 mathstat@mast.queensu.ca Office Hours: 8:30am-12:00pm & 1:00pm-4:30pm