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Nuclear Physics B
We complete the proof of the ghost-dilaton theorem in string theory by showing that the coupling constant dependence of the vacuum vertices appearing in the closed string action is given correctly by one-point functions of the ghost-dilaton. To prove this at genus one we develop the formalism required to evaluate off-shell amplitudes on tori.doi:10.1016/0550-3213(96)00179-4 fatcat:4zqaw7gbxrge5a4hgtjfvy5hvq