M. Cuntz

collaborators

3 papers

math.QA2008

An isomorphism between the fusion algebras of $V_{L}^{+}$ and type $D^{(1)}$ level 2

Michael Cuntz, Christopher Goff

The fusion algebra of the vertex operator algebra $V_{L}^{+}$ for a rank 1 even lattice $L$ is explicitly shown to be isomorphic to the fusion algebra of the Kac-Moody algebra of type…

math.GR2008

Weyl groupoids of rank two and continued fractions

M. Cuntz, I. Heckenberger

A relationship between continued fractions and Weyl groupoids of Cartan schemes of rank two is found. This allows to decide easily if a given Cartan scheme of rank two admits a fin…

math.RA2007

Fusion algebras with negative structure constants

Michael Cuntz

We introduce fusion algebras with not necessarily positive structure constants and without identity element. We prove that they are semisimple when tensored with $C$ and t…

An isomorphism between the fusion algebras of VL+​ and type D(1) level 2

Weyl groupoids of rank two and continued fractions

Fusion algebras with negative structure constants

An isomorphism between the fusion algebras of $V_{L}^{+}$ and type $D^{(1)}$ level 2