Predictions for scattering processes at particle colliders are done using perturbation theory, mostly using Feynman diagrams. Increasing precision requires increasing the order to which one computes, but sheer complexity puts a block on that road. Even worse, the corrections in many situations are too large for comfort. In this talk I show how both these problems may be addressed simultaneously, an approach called resummation. Theoretical underpinnings, applications to LHC physics and some recent developments are discussed.
Tea and coffee from 14.00.