# Queen's University - Department of Mathematics and Statistics

 Tuesday, March 13 Seminar in Free Probability and Random Matrices Time: 3:30 p.m. Place: Jeffery 319 Speaker: Jamie Mingo Title: The Infinitesimal Law of the real Wishart Ensemble, II Abstract Attached Wednesday, March 14 Number Theory Seminar Time: 2:15 p.m. Place: Jeffery 319 Speaker: Arpita Kar, Queen’s University Title: On the normal number of prime factors of Ramanujan Tau function Abstract Attached Wednesday, March 14 Curves Seminar Time: 3:30 p.m. Place: Jeffery 319 Speaker: Mike Roth Title: Zak’s theorems on tangencies III Abstract Attached Thursday, March 15 Math Club Time: 5:30 p.m. Place: Jeffery 118 Speaker: Greg Smith Title: Realistic Expectations Abstract Attached

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

Tuesday, March 13, 3:30 p.m. Jeffery 319

Seminar in Free Probability and Random Matrices

Speaker: Jamie Mingo

Title: The Infinitesimal Law of the real Wishart Ensemble, II

Abstract: I will continue from last week and compute the infinitesimal cumulants.

Wednesday, March 14, 2:15 p.m. Jeffery 319 - Number Theory Seminar

Speaker: Arpita Kar

Title: On the normal number of prime factors of Ramanujan Tau function

Abstract: We will discuss various results concerning $\omega(\tau(p))$, $omega(\tau(n))$, $\omega(\tau(p+1))$ where $\tau$ denotes Ramanujan Tau function and $\omega(n)$ denotes the number of prime factors of $n$ counted without multiplicity. This is work in progress with Prof. Ram Murty.

Wednesday, March 14, 3:30 p.m. Jeffery 319 - Curves Seminar

Speaker: Mike Roth

Title: Zak’s theorems on tangencies III

Abstract: We will prove Hartshorne’s conjecture on linear normality of subvarieties of small dimension, in the form of the restatement in terms of secant varieties.

Thursday, March 15, 5:30 p.m. Jeffery 118 - Math Club

Speaker: Greg Smith

Title: Realistic Expectations

Abstract: How many real roots should we expect a real polynomial to have? In this talk, we will convert this vague question into a well-posed mathematical problem. With the help of geometry, we will also provide the surprisingly beautiful solution.

### 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