A labeled graph whose nodes are indexed by the generators of a Coxeter Group having as an Edge labeled by whenever , where is an element of the Coxeter Matrix. Coxeter-Dynkin diagrams are used to visualize Coxeter Groups. A Coxeter-Dynkin diagram is associated with each Rational Double Point (Fischer 1986).
See also Coxeter Group, Dynkin Diagram, Rational Double Point
References
Arnold, V. I. ``Critical Points of Smooth Functions.'' Proc. Int. Congr. Math. 1, 19-39, 1974.
Fischer, G. (Ed.). Mathematical Models from the Collections of Universities and Museums.
Braunschweig, Germany: Vieweg, pp. 12-13, 1986.