To submit a request, click below on the link of the version you wish to order. Rules for end-users are available here.
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Dr. J.D. Lewins has now released the following legacy book for free distribution:
Importance: The Adjoint Function: The Physical Basis of Variational and Perturbation Theory in Transport and Diffusion Problems, North-Holland Publishing Company - Amsterdam, 582 pages, 1966
Introduction: Continuous Systems and the Variational Principle
The Fundamental Variational Principle
The Importance Function
Perturbation and Iterative Methods
Note to the user: Dr. J. D. Lewins owns the copyright of the book and he authorises the OECD/NEA Data Bank to distribute it in PDF format at no cost to requesters, in particular to students.
This book shall neither be further copied nor sold.
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Keywords: adjoint equation, importance function, legacy, nonlinear theory, particle transport, perturbation method, variational method.