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On the Uniqueness of String Theory
Nathan Berkovits, Cumrun Vafa
We show that bosonic strings may be viewed as a particular class of vacua for N=1 superstrings, and N=1 superstrings may be viewed as a particular class of vacua for N=2 strings. C…
Strings and Singularities
Cumrun Vafa
We review aspects of spacetime singularities from the view point of string theory. Examples considered include cosmological, cosmic string and black-hole singularities. We also dis…
Kodaira-Spencer Theory of Gravity and Exact Results for Quantum String Amplitudes
M. Bershadsky, S. Cecotti, H. Ooguri +1
We develop techniques to compute higher loop string amplitudes for twisted theories with (i.e. the critical case). An important ingredient is the discovery of an a…
Two dimensional black-hole as a topological coset model of c=1 string theory
S. Mukhi, C. Vafa, E. Frenkel
We show that a special superconformal coset (with ) is equivalent to matter coupled to two dimensional gravity. This identification allows a direct computation of…