Here are the PDF versions of the slides I used when giving the indicated talks.
2017
2016
2015

Primitive sets, Illinois Number Theory Conference, August 2015

Primitive sets, Elementary, analytic, and algorithmic number theory: Research inspired by the mathematics of Carl Pomerance, June 2015

Average values of some nonmultiplicative functions, Pacific Northwest Number Theory Conference, May 2015

Diophantine quadruples, UBC Number Theory Seminar, March 2015
2014
2012

Inclusive prime number races, Analytic Number Theory Seminar, CMS Winter Meeting, December 2012

Dimensions of spaces of newforms, UBC Number Theory Seminar, September 2012

Average values of some nonmultiplicative functions, Canadian Number Theory Association XII Meeting, University of Lethbridge, June 2012

Anatomy of the multiplicative group, Pacific Northwest Number Theory Conference, University of Idaho, May 2012
2011
2010

Prime number races: an asymptotic formula for the densities, Analytic and Combinatorial Number Theory, Institute of Mathematical Sciences, August 2010

Iterates of the Carmichael λfunction, Number Theory Week, Harish–Chandra Research Institute, August 2010

Diophantine quadruples, Number Theory Week, Harish–Chandra Research Institute, August 2010

How often is π(x;q,a) larger than π(x;q,b)?, Canadian Number Theory Association XI Meeting, July 2010

Prime number races, Dartmouth Mathematics Colloquium, May 2010

Diophantine quadruples, New York Number Theory Seminar, April 2010, and Dartmouth Number Theory Seminar, May 2010

Prime numbers: what we know, and what we know we think, College of Staten Island Mathematics Colloquium, April 2010
2009
2008
2007
2006
