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In this talk I want to explain as simply as I can the reason why some stochastic partial

differential equations, like e.g. KPZ, need a procedure called renormalisation.

This consists in a modification of the equation by adding new non-linearities that typically 

contain diverging constants. This is strongly related to a similar phenomenon in

quantum field theory and its explanation in the context of SPDEs is probably

more intuitive. Unfortunately a complete description of the procedure requires

an algebraic machinery that most probabilists prefer to avoid. However the

beauty of this technique resides also in the deep interplay between analysis,

algebra and probability.

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You will only need to wear very comfortable clothes, bring a yoga mat, and possibly a small blanket to cover yourself during the final relaxation. A cushion or yoga block could also be useful if sitting on the mat is uncomfortable for you.

The yoga lessons will take place in the auditorium, though we could also explore the possibility of occasionally practicing outdoors.