Starting from the classical Riemann-Roch theorem, I will describe the gradual generalizations leading to the Grothendieck-Riemann-Roch theorem. After this expository part, I will then describe some ideas in progress how to use the category of motives on stacks (developed in previous joint work with Timo Richarz) can be used to gain a conceptual proof of the equivariant GRR theorem.

We will meet here: https://wwu.zoom.us/j/98750589020