Boundaries, crosscaps and simple currents
J. Fuchs, L.R. Huiszoon, A.N. Schellekens, C. Schweigert, J. Walcher

TL;DR
This paper provides universal formulas for boundary and crosscap coefficients applicable to all symmetric simple current modifications of charge conjugation invariants in rational conformal field theories.
Contribution
It introduces universal formulas for boundary and crosscap coefficients across all symmetric simple current modifications in rational conformal field theories.
Findings
Formulas are valid for all symmetric simple current modifications.
Applicable to charge conjugation invariants in rational conformal field theories.
Enhances understanding of boundary and crosscap structures in CFTs.
Abstract
Universal formulas for the boundary and crosscap coefficients are presented, which are valid for all symmetric simple current modifications of the charge conjugation invariant of any rational conformal field theory.
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