# Noetherian Ring Seminar Spring 2014

Refreshments served in the Tea Room #4161

McHenry Building - Room 4130

For more information, contact Felicia Tabing

Noetherian Ring website:http://people.ucsc.edu/~fytabing/women/nring.html

**Friday, April 18, 2014**

**Women in Mathematics Social**

4:00pm

https://docs.google.com/forms/d/1N4oNjp3T0zl7w8S66AukET5FbM69ZVC7H6sGnc1xwag/viewform

**Debra Lewis, University of California, Santa Cruz**

**Wednesday May 7, 2014There will be tea and snacks at 4:15 p.m. in the Tea Room. The talk starts at 5:00pm in McHenry 4130.**

**Mapping Spheres to Spheres****Ayelet Lindenstrauss, Indiana University**

I would like to introduce a key concern of homotopy theory: the attempt to understand the homotopy groups of spheres, that is: given a $k$-dimensional sphere $S^k$ and an $n$-dimensional sphere $S^n$, to try to understand all possible continuous maps from $S^k$ to $S^n$ up to continuous deformation. These are not yet known in general. The data that we do have (and we have lots of it) shows rich and complex patterns; even the Bernoulli numbers, for example, make an appearance. I will present two methods of seeing interesting maps in relatively low dimensions, the Hopf map and the J-homomorphism.