Theoretical Physics(DTP)
Physique théorique (DPT)
Jiri PATERA
Université de Montréal
Orbit Functions of Compact Lie Groups and their Applications
An orbit function is the contribution to an irreducible character of a compact semisimple Lie group G, from one Weyl group orbit. Such functions are much simpler than the characters, but they carry most of the practically useful properties of the characters. Moreover, their versatile discrete orthogonality on certain finite Abelian subgroups of G, makes them particularly suitable for digital data processing.