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hep-th1997★ 135 cited
Heterotic / type I duality and D-brane instantons
C. Bachas, C. Fabre, E. Kiritsis +2
We study heterotic/type I duality in d=8,9 uncompactified dimensions. We consider the special (``BPS saturated'') F^4 and R^4 terms in the effective one-loop heterotic action, whic…
hep-th1996
One-loop Effective Action in Open-string theory
C. Fabre
This is a summary of the analysis of the one-loop effective action in Z_2-orbifold compactifications of type-I theory presented in references [1,2]. We show how, for non-abelian gr…
hep-th1996★ 16 cited
Aspects of Type I - Type II - Heterotic Triality in Four Dimensions
I. Antoniadis, C. Bachas, C. Fabre +2
We discuss the equivalence between Type I, Type II and Heterotic N=2 superstring theories in four dimensions. We study the effective field theory of Type I models obtained by orien…