I am currently studying physics as an undergrad, and I intend to pursue a PhD in theoretical physics. My intention in obtaining a math degree is simply to enhance my mathematical capabilities and thus make me better at solving physics problems. Furthermore, I hoped having this increased mastery of mathematics would make me a more appealing candidate when it comes time to apply to grad school. It has occurred to me that the math degree may be redundant because the most relevant math courses are already included in my physics degree plan. All advise is appreciated.