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We complete the computation of spectral measures for SU(3) nimrep graphs arising in subfactor theory, namely the SU(3) ADE graphs associated with SU(3) modular invariants and the McKay graphs of finite subgroups of SU(3). For the SU(2)…

Operator Algebras · Mathematics 2015-05-18 David E. Evans , Mathew Pugh

Braided subfactors of von Neumann algebras provide a framework for studying two dimensional conformal field theories and their modular invariants. We review this in the context of SU(3) conformal field theories through corresponding SU(3)…

Operator Algebras · Mathematics 2013-06-05 David E. Evans , Mathew Pugh

We classify the possible finite symmetries of conformal field theories with an affine Lie algebra su(2) and su(3), and discuss the results from the perspective of the graphs associated with the modular invariants. The highlights of the…

High Energy Physics - Theory · Physics 2009-10-31 S. Lienart , P. Ruelle , O. Verhoeven

We determine the cells, whose existence has been announced by Ocneanu, on all the candidate nimrep graphs except $\mathcal{E}_4^{(12)}$ proposed by di Francesco and Zuber for the SU(3) modular invariants classified by Gannon. This enables…

Operator Algebras · Mathematics 2014-11-20 David E. Evans , Mathew Pugh

The Haar functional on the quantum $SU(2)$ group is the analogue of invariant integration on the group $SU(2)$. If restricted to a subalgebra generated by a self-adjoint element the Haar functional can be expressed as an integral with a…

Quantum Algebra · Mathematics 2016-09-06 Erik Koelink , J. Verding

We determine the Nakayama automorphism of the almost Calabi-Yau algebra A associated to the braided subfactors or nimrep graphs associated to each SU(3) modular invariant. We use this to determine a resolution of A as an A-A bimodule, which…

Operator Algebras · Mathematics 2014-03-05 David E. Evans , Mathew Pugh

For a class of $*$-algebras, where $*$-algebra $A_{\Gamma,\tau}$ is generated by projections associated with vertices of graph $\Gamma$ and depends on a parameter $\tau$ $(0 < \tau \leq 1)$, we study the sets $\Sigma_\Gamma$ of values of…

Representation Theory · Mathematics 2008-04-24 Natasha D. Popova , Yurii S. Samoilenko

We consider a family of measures $\mu$ supported in $\br^d$ and generated in the sense of Hutchinson by a finite family of affine transformations. It is known that interesting sub-families of these measures allow for an orthogonal basis in…

Functional Analysis · Mathematics 2010-01-27 Dorin Ervin Dutkay , Palle E. T. Jorgensen

Given a finite, simple, vertex-weighted graph, we construct a graded associative (non-commutative) algebra, whose generators correspond to vertices and whose ideal of relations has generators that are graded commutators corresponding to…

Algebraic Topology · Mathematics 2012-06-13 Peter Bubenik , Leah H. Gold

The main goal of this paper is to classify $\ast$-module categories for the $SO(3)_{2m}$ modular tensor category. This is done by classifying $SO(3)_{2m}$ nimrep graphs and cell systems, and in the process we also classify the $SO(3)$…

Operator Algebras · Mathematics 2020-06-22 David E. Evans , Mathew Pugh

For a certain class of (nonunital) subalgebras of deformed preprojective algebra of affine type we describe their centers as certain deformation of Kleinian singularity and find their PI-degree. These results can be applied to algebras…

Rings and Algebras · Mathematics 2007-05-23 Anton Mellit

We propose the spectral degree exponent as a novel graph metric. Although Hofmeister \cite{HofmeisterThesis} has studied the same metric, we generalise Hofmeister's work to weighted graphs. We provide efficient iterative formulas and bounds…

Combinatorics · Mathematics 2025-02-05 Massimo A. Achterberg , Piet Van Mieghem

Spectral measures for fundamental representations of the rank two Lie groups $SU(3)$, $Sp(2)$ and $G_2$ have been studied. Since these groups have rank two, these spectral measures can be defined as measures over their maximal torus…

Operator Algebras · Mathematics 2016-04-25 David E. Evans , Mathew Pugh

We give a homological interpretation of the coefficients of the Hilbert series for an algebra associated with a directed graph and its dual algebra. This allows us to obtain necessary conditions for Koszulity of such algebras in terms of…

Rings and Algebras · Mathematics 2011-11-15 Vladimir Retakh , Shirlei Serconek , Robert Wilson

This is a note for constructing fundamental invariants and computing the Hilbert series of the invariant subalgebras of tensor products of polynomial rings under the action by a direct product of symmetric groups. Our computation relies on…

Combinatorics · Mathematics 2021-03-04 Zhipeng Lu

Joint spectral measures associated to the rank two Lie group $G_2$, including the representation graphs for the irreducible representations of $G_2$ and its maximal torus, nimrep graphs associated to the $G_2$ modular invariants have been…

Operator Algebras · Mathematics 2020-02-06 David E. Evans , Mathew Pugh

Let $P_E$ be the set of all values of a spectral measure $E$ and $A(P_E)$ be the smallest von Neumann algebra containing $P_E$. We give a simple description of all sets of generators of $A(P_E)$ in terms of the integrals with respect to…

Operator Algebras · Mathematics 2013-02-05 A. G. Smirnov

We study SU(3)-invariant integrable models solvable by nested algebraic Bethe ansatz. We obtain determinant representations for form factors of diagonal entries of the monodromy matrix. This representation can be used for the calculation of…

Mathematical Physics · Physics 2015-06-12 S. Belliard , S. Pakuliak , E. Ragoucy , N. A. Slavnov

We give generators and relations for the planar algebras corresponding to $ADE$ subfactors. We also give a basis and an algorithm to express an arbitrary diagram as a linear combination of these basis diagrams.

Quantum Algebra · Mathematics 2009-03-03 Stephen Bigelow

We apply the theory of $\alpha$-induction of sectors which we elaborated in our previous paper to several nets of subfactors arising from conformal field theory. The main application are conformal embeddings and orbifold inclusions of SU(n)…

High Energy Physics - Theory · Physics 2009-10-31 J. Bockenhauer , D. E. Evans
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