[微積] Books of differential equations
Does anybody know what introductory book of differential equations dealing with more
theoretical part which contains more theorems about some general problems
rather than pratical examples. I hope this book can be purchased in our
country. Thanks in advance!
我的背景大概就是會用普通的技巧來解微分方程,我想學的內容大概就是嚴謹的證明
我們所使用的定理. 本身學過一點高微跟拓樸學。
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