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[291] Andrew Strominger (Harvard University), interview with author, August 1, 2007. [292] Morrison, interview with author, May 29, 2008. [293] Brian Greene, Elegant Universe (New York: Vintage Books, 2000), pp. 268, 273. [294] Paul Aspinwall (Duke University), interview with author, June 6, 2008. [295] Morrison, interview with author, May 27, 2008. [296] Andrew Strominger (Harvard University), February 7, 2007. [297] Chris Beasley, Jonathan Heckman, and Cumrun Vafa, “GUTs and Exceptional Branes in F-Theory — I,” November 18, 2008, http://arxiv.org/abs/0802.3391; Chris Beasley, Jonathan Heckman, and Cumrun Vafa, “GUTs and Exceptional Branes in F-Theory — II: Experimental Predictions,” June 12, 2008, http://arxiv.org/abs/arxiv:0806.0102; Ron Donagi and Martijn Wijnholt, “Model Building with F-Theory,” March 3, 2008, http://lanl.arxiv.org/pdf/0802.2969v2; and Ron Donagi and Martijn Wijnholt, “Breaking GUT Groups in F-Theory,” August 17, 2008, http://lanl.arxiv,org/pdf/0808.2223vl. [298] Strominger, interview with author, July 23, 2007. [299] Cumrun Vafa (Harvard University), interview with author, November 2, 2007. [300] Leonard Mlodinow, Euclid's Mirror (New York: Simon & Schuster, 2002), p. 255. [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. [306] Donald Zeyl (University of Rhode Island), interview with author, October 18, 2007. — 302 —
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