It is shown that the deformed Calogero-Moser-Sutherland (CMS) operators can
be described as the restrictions on certain affine subvarieties (called
generalised discriminants) of the usual CMS operators for infinite number of
particles. The ideals of these varieties are shown to be generated by the Jack
symmetric functions related to the Young diagrams with special geometry. A
general structure of the ideals which are invariant under the action of the
quantum CMS integrals is discussed in this context. The shifted super-Jack
polynomials are introduced and combinatorial formulas for them and for
super-Jack polynomials are given.