James Stewart's Calculus series provides students with the strongest foundation for a STEM future by building problem-solving skills and developing critical thinking and conceptual understanding. Selected and mentored by Stewart, Daniel Clegg and Saleem Watson continue his precision, accuracy, and outstanding examples and problem sets. Careful refinements such as scaffolded exercises that build student confidence make the 9th edition an even more effective learning and teaching tool. WebAssign reinforces concepts and enables students to apply them with new Proof Problems, Expanded Problems, and Explore It interactive learning modules. Showing that Calculus is both practical and beautiful, the Stewart approach and WebAssign resources enhance understanding and build confidence for millions of students worldwide.

"The calculus of variations is one of the oldest subjects in mathematics, and it is very much alive and still evolving. Besides its mathematical importance and its links to other branches of mathematics, such as geometry or differential equations, it is widely used in physics, engineering, economics and biology. This book serves both as a guide to the expansive existing literature and as an aid to the non-specialist - mathematicians, physicists, engineers, students or researchers - in discovering the subject's most important problems, results and techniques. Despite the aim of addressing non-specialists, mathematical rigor has not been sacrificed; most of the theorems are either fully proved or proved under more stringent conditions. This new edition offers an entirely new chapter, as well as the addition of several new exercises. The book, containing a total of 147 exercises with detailed solutions, is well designed for a course at both undergraduate and graduate levels"--