On local fusion graphs of finite Coxeter groups. (English) Zbl 1284.20039
Summary: Given a finite group \(G\) and \(G\)-conjugacy class of involutions \(X\), the local fusion graph \(\mathcal F(G,X)\) has \(X\) as its vertex set, with \(x,y\in X\) joined by an edge if, and only if, \(x\neq y\) and the product \(xy\) has odd order. In this note we investigate such graphs when \(G\) is a finite Coxeter group, addressing questions of connectedness and diameter. In particular, our results show that local fusion graphs may have an arbitrary number of connected components, each with arbitrarily large diameter.
MSC:
20F55 | Reflection and Coxeter groups (group-theoretic aspects) |
05C25 | Graphs and abstract algebra (groups, rings, fields, etc.) |
20D60 | Arithmetic and combinatorial problems involving abstract finite groups |