Weak modules and logarithmic intertwining operators for vertex operator algebras
Antun Milas
Abstract
We consider a class of weak modules for vertex operator algebras that we call logarithmic modules. We also construct nontrivial examples of intertwining operators between certain logarithmic modules for the Virasoro vertex operator algebra. At the end we speculate about some possible logarithmic intertwiners at the level c=0.
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