Yes, the library has several books on the subject of mathematical physics, as well as access to several journals on the subject.
To see what books we have, enter the term mathematical physics into the Books keyword search (under the books tab on the library homepage). We have several ebooks as well as print books available for you to check out or peruse.
To see what journals at Walsh that would serve you, select the Find Exact Journal link from the library homepage (click the down arrow next to "Library Resources" at the top of the page) and then enter the term mathematical physics. The results will first show items with that title, then journals that contain those terms.