I was a professor at Stanford from 2011-2016. I got a PhD from Carnegie Mellon under the marvelous Manuel Blum, and I was an undergrad at Cornell.
For more, see my CV below.
|Tweets by @rrwilliams
|Teaching in Spring 2024: 18.405/6.541 Advanced Complexity Theory
Research InterestsIn general, I try to understand what is easy and what is hard to compute, independently of any particular computer. I work in algorithm design and complexity theory, and I especially like connections between the two subjects. I think about many questions, but a few of them haunt me more than others. Some examples: Can the existence of an algorithm for a problem be used to prove that other algorithms cannot exist for other problems? Can the nonexistence of algorithms be used to prove that another algorithm correctly solves a problem? (In fact, there are "yes" answers to both questions!) Does every function implementable with a low memory footprint also have a fast implementation? (Is $P = PSPACE$?) Could computers themselves help us make progress on answering these questions?
Current PhD StudentsShyan Akmal
Graduated PhD StudentsHuacheng Yu
Former PostdocsMichael Forbes (UIUC)
Roei Tell (DIMACS/IAS)
About MeI grew up near the big city of Somerville, Alabama, where there is good fishing in the water and good football on the radio. Further south in Alabama there is a good school for math and science.