I somehow managed to get Bs in two calculus courses and was pretty confident that in a pinch I was capable of doing work involving lagrange multipliers, Green's theorem, convergences of improper integrals, and such. My textbook was multivariable calculus by Larson and Edwards which I was sold forever ago. This semester I just enrolled in a Linear Algebra + Ordinary Differential Equations course so I figured I would need to go back and get a good reference for filling gaps in my knowledge and reviews on Amazon and this forum pointed to Widder as a cheap, highly worthwhile purchase.(adsbygoogle = window.adsbygoogle || []).push({});

I'm having a much harder time with this than I thought I would. Do I need to go back to basics and pretty much relearn calculus? Did those courses I take simply fail to prepare me for serious work? Is there a certain approach I should take with this book? This seems so much more abstract than what I remember doing. I have the Tenenbaum book on ODEs which is just perfect for me and I'm enjoying so far and yet somehow Widder is overwhelming.

I do recall seeing an old post somewhere mentioning a difference between doing Calculus and truly understanding Calculus at a more fundamental level.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# I underestimated the difficulty of Widder's Advanced Calculus

**Physics Forums | Science Articles, Homework Help, Discussion**