%0 Journal Article %T Global Mackey functors with operations and n-special lambda rings %A Nora Ganter %J Mathematics %D 2013 %I arXiv %X Systematically using the language of groupoids, we survey the theory of global Mackey functors, global Green functors and global power functors. Given a global power functor, we study rings with similar operations. The example of n-class functions leads to the notion of an n-special lambda ring. %U http://arxiv.org/abs/1301.4616v1