Negative Positive
Title: Profound and elegant
Review: Lanzcos has his name attached to many area of mathematical physics. Besides that, he is an excellent writer. This book on variationnal principle of mechanics is the most beautifull and profound one I've read on the subject. This book is well suited for undergrad or grad students, but even for reasearcher who uses the tools of analytical mechanics, it's worth reading it.
Is the review positive or negative? 