D. Tan

collaborators

3 papers

math.QA2025

Differential equations for intertwining operators among untwisted and twisted modules

Daniel Tan

Given any vertex operator algebra $V$ with an automorphism $g$ , we derive a Jacobi identity for an intertwining operator $Y$ of type $ \left( \begin{smallmatrix} W_…

math.QA2025

$C_{n}$ -cofinite twisted modules for $C_{2}$ -cofinite vertex operator algebras

Daniel Tan

Given a vertex operator algebra $V$ with a general automorphism $g$ of $V$ , we introduce a notion of $C_{n}$ -cofiniteness for weak $g$ -twisted $V$ -modules. When $V$ is…

math.RT2025

The structure of non-Fricke Monstrous Lie algebras

Daniel Tan

We consider Borcherds algebras with no real roots and the property that all zeroes in the Borcherds Cartan matrix occur in a single diagonal zero block. It follows that all other e…

Differential equations for intertwining operators among untwisted and twisted modules

Cn​-cofinite twisted modules for C2​-cofinite vertex operator algebras

The structure of non-Fricke Monstrous Lie algebras

$C_{n}$ -cofinite twisted modules for $C_{2}$ -cofinite vertex operator algebras