I was wondering whether I should brush up on ode's/pde's or just go through the math(adsbygoogle = window.adsbygoogle || []).push({});

appendix of Griffiths to prepare myself. How much ode's/pde's is needed for Griffiths

and Ryden? Thanks

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# Advice on being mathematically prepared (QM Griffiths and Cosmology Ryden)

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