As they say "the more math you learn the better". Unfortunately, I did not have a lot of mathematical training in my undergraduate. Now I am doing a master in mathematics, mainly to make up some necessary background knowledge in mathematics in order to do my statistics. So far I have done metric space analysis, group and ring, and two numerical computation courses. Now I am considering what subjects to take next semester. So far I have decided to do topological analysis, probability theory. I am not sure whether it is useful to take more algebra course like Galois Theory. Any suggestion, general or specific, would be appreciated. Thank you in advance!