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内容简介:
The principle of least action originates in the idea that Nature has a purpose and
thus should follow a minimum or critical path. This basic principle, with its variants
and generalizations, applies to optics, mechanics, electromagnetism, relativity and
quantum mechanics, and provides a guide to understanding the beauty of physics.
This text provides an accessible introduction to the action principle across these
various fields of physics and examines its history and fundamental role in science.
It includes explanations from historical sources, discussions of classic papers, and
original worked examples.
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