## 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 28, 2017 - 11:00 AM EDT

**Mohammad Mahmoud, University of Waterloo**

"On the Computable Categoricity of Trees of Finite Height"

Tuesday, March 28, 2017 - 3:00 PM EDT

**Jonny Stephenson, Department of Pure Mathematics, University of Waterloo**

"The c.e. embeddability condition"

We will discuss the c.e. embeddability condition, which is a condition introduced by Richter, and which provides an exact characterization of those structures which do not code any non-c.e. sets. Such structures cannot have nontrivial Turing or enumeration degrees. If time permits, we will demonstrate that linear orderings have the c.e. embeddability condition.

MC 5403

Thursday, March 30, 2017 - 1:30 PM EDT

**Oleksiy Klurman, University College London**

"Multiplicative functions over the function fields"

Thursday, March 30, 2017 - 4:00 PM EDT

**Anton Mosunov (Pure Mathematics) and Luis Antonio Ruiz (Combinatorics & Optimization), University of Waterloo**

"Tomato Packing and Lettuce-Based Crypto"

Lettuce is good for you. Lattices are good for humanity. We are going to present some nutritious facts about lattices and convince you that they are good for your mathematical diet. Anton will explain the importance of lattices in the tomato/orange/sphere packing problem, and Antonio will show you that many portions of lattices a day may keep you safe from quantum hackers.

MC 5501

Friday, March 31, 2017 - 2:30 PM EDT

**Ben Sibley, Simons Center, Stony Brook University**

"Limits and bubbling sets for the Yang-Mills flow on Kaehler manifolds"

Friday, March 31, 2017 - 3:30 PM EDT

**Jaspar Wiart, Department of Pure Mathematics, University of Waterloo**

"The Jacobson Radical of Certain Semicrossed Products"

We study the Jacobson radical of the semicrossed product $A\times_\alpha P$ when $A$ is a simple C*-algebra and $P$ is either a subsemigroup of an abelian group or a free semigroup. A full characterization is obtained for a large subset of these semicrossed products and we apply our results to a number of examples.

MC 5417

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