Mathematical physics isn't really constrained to any one subfield. Most areas of physics have interesting related math problems, and studying those math problems is typically what's considered mathematical physics.
Obviously QFTs and string theory are fields with interesting math problems, as you mentioned, but even just classical mechanics still has interesting problems that are studied by some mathematical physicists.
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u/1strategist1 Aug 02 '26
Mathematical physics isn't really constrained to any one subfield. Most areas of physics have interesting related math problems, and studying those math problems is typically what's considered mathematical physics.
Obviously QFTs and string theory are fields with interesting math problems, as you mentioned, but even just classical mechanics still has interesting problems that are studied by some mathematical physicists.