Libros de Estudios y ensayos, página 26 de 143

2ª Edición.

Superstrings - provocative, controversial, possibly untestable, but unarguably one of the most interesting and active areas of research in current physics. Called by some, "the theory of everything", superstrings may solve a problem which has eluded physicists for the past 50 years - the final unification of the two great theories of the twentieth century, general relativity and quantum field theory. Now, here is a course-tested comprehensive introductory graduate text on superstrings which stresses the most current areas of interest, not covered in other presentation, including: - string field theory - multi loops - Teichmueller spaces - conformal field theory - four-dimensional strings. The book begins with a simple discussion of point particle theory, and uses the Feynman path integral technique to unify the presentation of superstrings. Prerequisites are an aquaintance with quantum mechanics and relativity. This second edition has been revised and updated throughout.

Esta obra está dirigida al estudio de las vibraciones atómicas de los sólidos y de sus propiedades asociadas, fundamentalmente térmicas. Las vibraciones reticulares constituyen uno de los grandes bloques (junto con los electrones de conduccion) que conforman la Fisica del Estado Solido, una materia esencial en los estudios de Fisica, Quimica e Ingenieria por el enorme desarrollo y potencial que tienen los materiales en el avance cotidiano de la sociedad. A pesar de su importancia, la dinamica reticular es con mucha diferencia la parte de los solidos peor comprendida por los estudiantes. De hecho, los libros de texto de Estado Solido limitan su estudio a uno o dos capitulos, centrandose en casos excesivamente simples que no permiten una traslacion directa ...

This book is an exposition of semi-Riemannian geometry (also called pseudo-Riemannian geometry)--the study of a smooth manifold furnished with a metric tensor of arbitrary signature. The principal special cases are Riemannian geometry, where the metric is positive definite, and Lorentz geometry. For many years these two geometries have developed almost independently: Riemannian geometry reformulated in coordinate-free fashion and directed toward global problems, Lorentz geometry in classical tensor notation devoted to general relativity. More recently, this divergence has been reversed as physicists, turning increasingly toward invariant methods, have produced results of compelling mathematical interest.