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Physics is where it's more commonly studied, if you study computational physics or nonlinear dynamics. However, in Mathematics you see more advanced and formalized stuff, but you probably need to find some optional modules that cover it (or it's only something you'll have available in grad school).
By the way, it seems that it's just too early for you to already decide on what you want to specialise in. Physics vs Math as a degree, to me, boils down to:
Do you prefer visualisation, logical intuition, having extremely challenging problems to solve and trying to figure out an approximation of how the universe you live works
Or do you prefer extreme rigour, neat and clean logic, formalism and the ability to reinterpret different fields with the tools/techniques borrowed from others?
Choose Physics for the first and Math for the second.