## Contact Info

Pure MathematicsUniversity of Waterloo

200 University Avenue West

Waterloo, Ontario, Canada

N2L 3G1

Departmental office: MC 5304

Phone: 519 888 4567 x33484

Fax: 519 725 0160

Email: puremath@uwaterloo.ca

Tuesday, March 20, 2018 — 1:30 PM EDT

**Arpita Kar, Queen's University**

"On the normal number of prime factors of Ramanujan Tau function"

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

MC 5417

Tuesday, March 20, 2018 — 3:00 PM EDT

**Nickolas Rollick, Department of Pure Mathematics, University of Waterloo**

"The ideal tool"

Wednesday, March 21, 2018 — 2:00 PM EDT

**Eli Shamovich, Department of Pure Mathematics, University of Waterloo**

"Free Function Theory and Operator Algebras"

Friday, March 23, 2018 — 2:00 PM EDT

**Jake Zimmermann Simmons, Department of Pure Mathematics, University of Waterloo**

"An example of a variety which is locally finite and residually finite but not residually < N for any natural number N (and also unfortunately not of finite type)"

Friday, March 23, 2018 — 2:30 PM EDT

**Jonathan Fraser, University of St. Andrews**

"The Assouad spectrum"

Friday, March 23, 2018 — 2:30 PM EDT

**Matthias Nagel, McMaster University**

"Triple linking numbers and surface systems"

We relate fillability of two link exteriors, and the question when two links admit homeomorphic surface systems to (a refinement of) Milnor’s triple linking numbers. This extends a theorem of Davis-Roth to include also links with non-vanishing linking numbers. This is joint work with C. Davis, P. Orson, and M. Powell.

MC 5403

University of Waterloo

200 University Avenue West

Waterloo, Ontario, Canada

N2L 3G1

Departmental office: MC 5304

Phone: 519 888 4567 x33484

Fax: 519 725 0160

Email: puremath@uwaterloo.ca

University of Waterloo

University of Waterloo

43.471468

-80.544205

200 University Avenue West

Waterloo,
ON,
Canada
N2L 3G1