In this course, we will review some intuitions and basics of topological data analysis. More precisely, we will learn
why and how topology (and geometry) are useful for data analysis;
basics of simplicial complexes and simplicial homology;
introduction to some geometric simplicial complexes (e.g., Čech complex, Vietoris–Rips complex, ...);
basics of persistent homology (PH) and some algorithms for computing PH;
some recent research results on persistent homology. In particular, the connection between PH and geometric quantities such as filling radius and systole.