Regular patterns in Coxeter groups
Clicking on a chamber xC will exhibit all chambers yC with a link from y to x in the right W-graph.

  • G. Lusztig, Nonlocal finiteness of a W-graph, Representation Theory 1 (1996), pp. 25-30. Shows mu(pqn, pqm != 0 for m > n > 0, m even, n odd.