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Preface

Published online by Cambridge University Press:  27 October 2009

David J. Toms
Affiliation:
University of Newcastle upon Tyne
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Summary

Then Jurgen mounted this horse and rode away from the plowed field wherein nothing grew as yet. As they left the furrows they came to a signboard with writing on it, in a peculiar red and yellow lettering. Jurgen paused to decipher this.

‘Read me!’ was written on the signboard: ‘read me, and judge if you understand! So you stopped in your journey because I called, scenting something unusual, something droll. Thus, although I am nothing, and even less, there is no one that sees me but lingers here. Stranger, I am a law of the universe. Stranger, render the law what is due the law!’

Jurgen felt cheated. ‘A very foolish signboard, indeed! for how can it be ‘a law of the universe’, when there is no meaning to it!’ says Jurgen. ‘Why, for any law to be meaningless would not be fair.’

(James Branch Cabell)

The quantum theory of fields is now a mature and well-developed subject with a wide range of applications to physical systems. The predominant approach that is taught to students today is the Feynman path integral. There is another approach that receives much less attention due to Schwinger, and his method is the main emphasis of the present book.

The intention of this book is to present the material in a manner that is accessible to final-year undergraduates or beginning postgraduate students.

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Publisher: Cambridge University Press
Print publication year: 2007

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  • Preface
  • David J. Toms, University of Newcastle upon Tyne
  • Book: The Schwinger Action Principle and Effective Action
  • Online publication: 27 October 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511585913.001
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  • Preface
  • David J. Toms, University of Newcastle upon Tyne
  • Book: The Schwinger Action Principle and Effective Action
  • Online publication: 27 October 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511585913.001
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Preface
  • David J. Toms, University of Newcastle upon Tyne
  • Book: The Schwinger Action Principle and Effective Action
  • Online publication: 27 October 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511585913.001
Available formats
×