Two stratifications in p-adic Hodge theory

In this talk, we will introduce two Harder-Narasimhan formalisms in p-adic Hodge theory which defines two stratifications: one is called Newton strafication and the other is called Harder-Narasimhan stratification. Newton stratification is the image of the p-adic period mapping and Harder-Narasimhan stratification is its algebraic approximation. In this talk, we will explain the basic properties of these two stratifications and their relations.