To learn PDE, you need some knowledge of physics (to build up the intuition), solid training of analysis (to prove or estimate something) and good philosophy to testify whether there is a future (for some problem) or not.
To learn PDE, you need some knowledge of physics (to build up the intuition), solid training of analysis (to prove or estimate something) and good philosophy to testify whether there is a future (for some problem) or not.