I will discuss joint work in progress with Allen, Calegari, Gee, Helm, Le Hung, Newton, Scholze, Taylor, and Thorne on potential automorphy over CM fields. I will give an overview of this work and mention some applications. I will then focus on how to prove one of our key inputs, namely local-global compatibility at $l=p$ for certain Galois representations attached to torsion classes in the cohomology of locally symmetric spaces. This relies crucially on some ingredients from representation theory in positive characteristic.
Links:
[1] http://www.mpim-bonn.mpg.de/de/taxonomy/term/39
[2] http://www.mpim-bonn.mpg.de/de/node/3444
[3] http://www.mpim-bonn.mpg.de/de/node/8209