One day, I decided to find out in which places topics in Mathematics and Physics were interlinked or used to prove results in each other's topics. Most of Mathematics is applied everywhere in Physics - from Calculus to Group Theory etc. I considered that possibly the only field which is not talked much about is the application of Topology to Physics and vice-versa. So what do you think about this? What are the possibilities for research? What has been done? Do you have any books or online articles to recommend?? Also, do you have any other possible topics in interconnection of Physics and Mathematics that are interesting??