Abstract
The study of the special F^4 and R^4 in the effective action for the Spin(32)/Z_2 and type II strings sheds some light on D-brane calculus and on instanton contribution counting. The D-instanton case is discussed separately.
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Submitted on 8 Dec 1997 (v1), last revised 17 Dec 1997 (this version, v3)
Updated
arXiv.org
Original Source