I'm currently taking differential equations but the guide book (Elementary differential equations and boundary value problems) is aimed for engineers (much like the calculus one from Stewart). I'm looking for a book with the classic mathematical format (definition, theorem, corollary...) and not too much talk or applications.
Thanks
I'm certainly no expert, but I have particularly enjoyed An Introduction to Ordinary Differential Equations by Earl Coddington. I used it along side Elementary Differential Equations and Boundary Value Problems by Boyce and Diprima and it is definitely a nice complement to that.