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A good way to learn differential equations rigorousty

There are many, many books on ODEs, many of them good. For the basic theory no one seems to have improved much on the book of Coddington and Levinson cited by Gerald Edgar. That book is old-fashioned, ...
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Is the Wronskian still assumed for graduate education?

It is discussed in all the introductory DEqns texts of which I've used. It's needed to complete the discussion of linear independence of solution sets. Together with Abel's formula it provides some ...
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Is the Wronskian still assumed for graduate education?

I would say the assumption is that people heading to mathematics graduate school know about the Wronskian, but this assumption isn't universally true. Certainly, anyone who has studied a semester of ...
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A good way to learn differential equations rigorousty

There's nothing wrong with learning it rigorously, but I would recommend to learn it "non-rigorously" first and then rigorously. E.g. in the context of a "graduate" ODE course. ...
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A good way to learn differential equations rigorousty

A classic book is Coddington & Levinson, Theory of Ordinary Differential Equations. Probably tough going for most students. Coddington, An Introduction to Ordinary Differential Equations. Much ...
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