This is a set of lecture notes given by the author at the Universities of Gцttingen and Wroclaw. The text presents the axiomatic approach to field theory and studies in depth the concepts of symmetry and supersymmetry and their associated

International trade: an application of economic theory.

Pseudo-isotopies of compact manifolds

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There is no required textbook. Much of the material in the course is based on quite recent research that has not yet appeared in any book. Many relevant research articles can be accessed through the quant-ph eprint archive maintained by

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A quantum field theory text for the twenty-first century, this book makes the essential tool of modern theoretical physics available to any student who has completed a course on quantum mechanics and is eager to go on." Without a solid

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Put as simply as possible, this is a book on Einstein's theory of gravity (general relativity). It is the first textbook on the subject that uses throughout the modern formalism and notation of differential geometry, and it is the first

Generalized point models in structural mechanics

This valuable reference examines the latest developments in the oscillatory and nonoscillatory properties of solutions for functional differential equations, clearly presenting basic oscillation theory as well as up-to-the-minute results;many previously unpublished.

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These are the notes of a course on Lie algebras which I gave at the universityof Bordeaux in spring 1997. The course was a so-called \Cours PostDEA",and as such had to be held within 12 hours. Even more challenging, noprevious

History of the theory of numbers. Volume 3: quadratic and higher forms

Equivalence Transformations for Classes of Differential Equations