Feb 5: Sylvain Cappell, CIMS
What kinds of invariants are used to classify spaces and their symmetries?
We introduce kinds of invariants used to study and classify:
1) manifolds (in 3 levels of structure - differentiable, piecewise differentiable
and topological); 2) more generally, varieties and their singularities;
3) the symmetries of all these, i.e., transformation groups which act on them.