Question: At what university did professor Lee Smolin popularize the theory of casual dynamical triangulation (CDT)? 
Sentence (from "Lee Smolin"): Lee Smolin ( ; born June 6, 1955) is an American theoretical physicist, a faculty member at the Perimeter Institute for Theoretical Physics, an adjunct professor of physics at the University of Waterloo and a member of the graduate faculty of the philosophy department at the University of Toronto.
Relevant evidence: Yes