I am an undergraduate students who is trying to start doing researches. My professor want me to read Jean-Pierre Serre's Linear_Representations, which I don't quite understand much. I use the first chapter of Serge Lang's Algebra as reference to learn the basic algebra terms. I am currently taking classes on Real Analysis and Abstract Linear Algebra using [Maxwell_Rosenlicht]_Introduction_to_Analysis and serge-lang-linear-algebra. I wonder what other things do I have to know before I can start to work on Linear Representations?