Methods of Mathematical Physics, Volume 1ISBN: 9780471504474
575 pages
January 1991

THE ALGEBRA OF LINEAR TRANSFORMATIONS AND QUADRATIC FORMS.
Transformation to Principal Axes of Quadratic and Hermitian Forms.
MinimumMaximum Property of Eigenvalues.
SERIES EXPANSION OF ARBITRARY FUNCTIONS.
Orthogonal Systems of Functions.
Measure of Independence and Dimension Number.
Fourier Series.
Legendre Polynomials.
LINEAR INTEGRAL EQUATIONS.
The Expansion Theorem and Its Applications.
Neumann Series and the Reciprocal Kernel.
The Fredholm Formulas.
THE CALCULUS OF VARIATIONS.
Direct Solutions.
The Euler Equations.
VIBRATION AND EIGENVALUE PROBLEMS.
Systems of a Finite Number of Degrees of Freedom.
The Vibrating String.
The Vibrating Membrane.
Green's Function (Influence Function) and Reduction of Differential Equations to Integral Equations.
APPLICATION OF THE CALCULUS OF VARIATIONS TO EIGENVALUE PROBLEMS.
Completeness and Expansion Theorems.
Nodes of Eigenfunctions.
SPECIAL FUNCTIONS DEFINED BY EIGENVALUE PROBLEMS.
Bessel Functions.
Asymptotic Expansions.
Additional Bibliography.
Index.
Richard Courant (1888 ¿ 1972) obtained his doctorate at the University of Göttingen in 1910. Here, he became Hilbert¿s assistant. He returned to Göttingen to continue his research after World War I, and founded and headed the university¿s Mathematical Institute. In 1933, Courant left Germany for England, from whence he went on to the United States after a year. In 1936, he became a professor at the New York University. Here, he headed the Department of Mathematics and was Director of the Institute of Mathematical Sciences  which was subsequently renamed the Courant Institute of Mathematical Sciences. Among other things, Courant is well remembered for his achievement regarding the finite element method, which he set on a solid mathematical basis and which is nowadays the most important way to solve partial differential equations numerically.
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