(G,χϕ)-equivariant ϕ-coordinated quasi modules for nonlocal vertex algebras.

In this paper, we study (G , χ ϕ) -equivariant ϕ -coordinated quasi modules for nonlocal vertex algebras. Among the main results, we establish several conceptual results, including a generalized commutator formula and a general construction of weak quantum vertex algebras and their (G , χ ϕ) -equivariant ϕ -coordinated quasi modules. As an application, we also construct (equivariant) ϕ -coordinated quasi modules for lattice vertex algebras by using Lepowsky's work on twisted vertex operators. [ABSTRACT FROM AUTHOR]