Orbifold twist field correlation functions and coset bosonization of parafermions

An Essay on String Theory Theoretical motivation for problem solving is
grounded in the self-consistency, beauty, and depth of the ideas applied. This
motivation exists independently of the experimental verification of the theory,
which is of course the primary method of distinguishing physics from mathematics
. A theory is often well motivated on theoretical grounds, and its underlying
formalism is well developed, but the connection to the phenomenon where it
should apply becomes ...