There are many books on math in the Cox Library collection. You can find them mostly in the 510s:
510.1 Philosophy and theory
511 General principles of mathematics
512 Algebra
513 Arithmetic
514 Topology
515 Analysis
516 Geometry
518 Numerical analysis
519 Probabilities and applied mathematics
There are books in other areas, as well, and you should use the catalog to find them! Some of our newer books are below.