Talk by Alex Stokolos, "Bellman Functions - be perfect at every step".
Abstract: The method of Bellman Functions, originated by Brukholder, Nazarov, Treil and Volberg, become more and more popular tool of a modern Harmonic Analysis. The method is elementary in nature and can be used in undergraduate teaching, both in class and online. In the talk I will illustrate basic steps of the method on examples of classical Holder inequality and estimates of dyadic Hardy-Littlewood maximal function. This is a joint project with L.Slavin and V.Vasyunin.