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Exact Black Hole Degeneracies and the Topological String
David Shih, Xi Yin
Motivated by the recent conjecture of Ooguri, Strominger and Vafa, we compute the semi-canonical partition function of BPS black holes in N=4 and N=8 string theories, to all orders…
Counting Dyons in N=8 String Theory
David Shih, Andrew Strominger, Xi Yin
A recently discovered relation between 4D and 5D black holes is used to derive exact (weighted) BPS black hole degeneracies for 4D N=8 string theory from the exactly known 5D degen…
Recounting Dyons in N=4 String Theory
David Shih, Andrew Strominger, Xi Yin
A recently discovered relation between 4D and 5D black holes is used to derive weighted BPS black hole degeneracies for 4D N=4 string theory from the well-known 5D degeneracies. Th…
Flux Vacua and Branes of the Minimal Superstring
Nathan Seiberg, David Shih
We analyze exactly the simplest minimal superstring theory, using its dual matrix model. Its target space is one dimensional (the Liouville direction), and the background fields in…
Open/Closed String Duality for Topological Gravity with Matter
Akikazu Hashimoto, Min-xin Huang, Albrecht Klemm +1
The exact FZZT brane partition function for topological gravity with matter is computed using the dual two-matrix model. We show how the effective theory of open strings on a stack…