%0 Journal Article %T Structure constants for Hecke and representation rings %A Thomas J. Haines %J Mathematics %D 2003 %I arXiv %X We study the structure constants defining two related rings: the spherical Hecke algebra of a split connected reductive group over a non-Archimedean local field, and the representation ring of the Langlands dual group. %U http://arxiv.org/abs/math/0304176v1