学术报告（罗天文 9.19）

In this talk, we review some topics on the compressible Euler equations, including the Riemann problems, entropy conditions, formation of shocks and rarefaction waves. In particular, we will talk about the recent breakthrough on multi-dimensional shocks by Christodoulou et al. We will also talk about our recent joint work with Pin Yu on multidimensional rarefaction waves.