Logarithmic intertwining operators and the space of conformal blocks over the projective line

preprint2011arXivOpen access

Abstract

We show that the space of logarithmic intertwining operators among logarithmic modules for a vertex operator algebra is isomorphic to the space of 3-point conformal blocks over the projective line. This is considered as a generalization of Zhu's result for ordinary intertwining operators among ordinary modules.

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