301
Edward Witten (Institute for Advanced Study), e-mail letter to author, February 12, 2007.
302
David Morrison (University of California, Santa Barbara), interview with author, May 27, 2008.
303
Ravi Vakil (Stanford University), interview with author, May 28, 2008.
304
Strominger, interview with author, August 1, 2007.
305
Piers Bursill-Hall, “Why Do We Study Geometry? Answers Through the Ages,” lecture, Faulkes Institute for Geometry, University of Cambridge, May 1, 2002.
