Equivariant multiplications and idempotent splittings of > G-spectra

My PhD research concerns multiplicative phenomena in > equivariant stable homotopy theory. Equivariantly with respect to a > finite group G, there are many different notions of a commutative ring > spectrum. The idempotent summands of the genuine equivariant versions > of the sphere spectrum and the topological K-theory spectra provide > natural examples of such objects. I give a complete characterization > of the best possible equivariant commutative ring structures on these > summands. As an important step in my approach, I establish a > classification of the idempotent elements in the (p-local) > representation ring of G, which may be of independent interest.