In this book, we report on research in methods of computational magneto-
hydrodynamics supported by the United States Department of Energy under
Contract EY-76-C-02-3077 with New York University. The work has re-
sulted in a computer code for mathematical analysis of the equilibrium
and stability of a plasma in three dimensions with toroidal geometry but
no sym- metry. The code is listed in the final chapter. Versions of it
have been used for the design of experiments at the Los Alamos
Scientific Laboratory and the Max Planck Institute for Plasma Physics in
Garching. We are grateful to Daniel Barnes, Jeremiah Brackbill, Harold
Grad, William Grossmann, Abraham Kadish, Peter Lax, Guthrie Miller,
Arnulf Schliiter, and Harold Weitzner for many useful discussions of the
theory. We are especially indebted to Franz Herrnegger for theoretical
and pedagogical comments. Constance Engle has provided outstanding
assistance with the typescript. We take pleasure in acknowledging the
help of the staff of the Courant Mathematics and Com- puting Laboratory
at New York University. In particular we should like to express our
thanks to Max Goldstein, Kevin McAuliffe, Terry Moore, Toshi Nagano and
Tsun Tam. Frances Bauer New York Octavio Betancourt September 1978 Paul
Garabedian v Contents Chapter 1. Introduction 1 1. 1 Formulation of the
Problem 1 1. 2 Discussion of Results 2 Chapter 2. The Variational
Principle 4 4 2. 1 The Magnetostatic Equations 6 2. 2 Flux Constraints
in the Plasma . 7 2. 3 The Ergodic Constraint .