Libros de ciencias, página 371 de 2843

Vivimos en una autentica Edad de Oro de la exploración. Los observatorios de última generación han cartografiado las regiones más alejadas del cosmos y las sondas espaciales nos han permitido contemplar de primera mano el sistema solar. Galaxia nos descubre la nueva y asombrosa vision del universo resultante de esos avances. Descubre con Galaxia el gran espectaculo del Cosmos.

Fixed Income Mathematics is an easy-to-understand introduction to the mathematics of common fixed income instruments. This book offers explanations, exercises, and examples without demanding sophisticated mathematics from the reader. Not only does the author use his business and teaching experience to highlight the fundamentals of investment and management decision-making, but he also offers questions and exercises that suggest the applicability of fixed income mathematics. Written for the reader with a general mathematics background, this self-teaching book is suffused with examples that also make it a handy reference guide. It should serve as a gateway to financial mathematics and to increased competence in business analysis. International comparisons are used to illustrate how interest is compounded. This text will be a valuable resource for professional insurance and other actuarials who invest in bonds and who are concerned with inflation, asset-liability management, the time value of money, interest rates, rates of return, risk, and investment income. It will also appeal to MBA students and anyone seeking a general introduction or overview of the subject.

Reconèixer i identificar els ocells que visiten el nostre jardí ara és més fàcil: gràcies a aquesta guia naturalista amb fotografies de mida real, el risc de confusió és pràcticament nul! ? 60 visita

"La permacultura es un sistema de diseño de hábitats humanos sostenibles y a su alrededor se ha generado un movimiento ciudadano con presencia en más de 100 países a lo largo y ancho del mundo. Durante decadas desde la permacultura se han venido dando respuestas creativas a los cambios que se han ido produciendo en las condiciones climaticas locales. Al hacerlo se han ido desarrollando unos conocimientos y experiencias colectivas que resultan de un enorme valor a la hora de afrontar el cambio climatico.Este libro, elaborado por dos grandes academicos, trae esta experiencia desde los margenes al centro de los debates sobre politicas y de la accion frente al cambio climatico. En el se nos explica a grandes rasgos como las bases filosoficas de la permacultura y su perspectiva con respecto al cambio climatico complementan a las de la ciencia formal y detalladas y accesibles de aplicaciones practicas partiendo de casos de estudio de diferentes lugares del mundo ilustrados con excelentes fotografias. Los autores tambien se plantean como podrian las respuestas globales sacar el maximo partido de las contribuciones unicas que la permacultura puede hacer."

This research monograph presents many new results in a rapidly developing area of great current interest. Guillemin, Ginzburg, and Karshon show that the underlying topological thread in the computation of invariants of G-manifolds is a consequence of a linearization theorem involving equivariant cobordisms. The book incorporates a novel approach and showcases exciting new research. During the last 20 years, ``localization'' has been one of the dominant themes in the area of equivariant differential geometry. Typical results are the Duistermaat-Heckman theory, the Berline-Vergne-Atiyah-Bott localization theorem in equivariant de Rham theory, and the ``quantization commutes with reduction'' theorem and its various corollaries. To formulate the idea that these theorems are all consequences of a single result involving equivariant cobordisms, the authors have developed a cobordism theory that allows the objects to be non-compact manifolds. A key ingredient in this non-compact cobordism is an equivariant-geometrical object which they call an ``abstract moment map''. This is a natural and important generalization of the notion of a moment map occurring in the theory of Hamiltonian dynamics. The book contains a number of appendices that include introductions to proper group-actions on manifolds, equivariant cohomology, Spin${mathrm{c $-structures, and stable complex structures. It is geared toward graduate students and research mathematicians interested in differential geometry. It is also suitable for topologists, Lie theorists, combinatorists, and theoretical physicists. Prerequisite is some expertise in calculus on manifolds and basic graduate-level differential geometry.

In the theory of minimal submanifolds, Bernstein''s problem and Plateau''s problem are central topics. This important book presents the DouglasRado solution to Plateau''s problem, but the main emphasis is on Bernstein''s problem and its new developments in various directions: the value distribution of the Gauss image of a minimal surface in Euclidean 3-space, Simons'' work for minimal graphic hypersurfaces, and the author''s own contributions to Bernstein type theorems for higher codimension. The author also introduces some related topics, such as submanifolds with parallel mean curvature, Weierstrass type representation for surfaces of mean curvature 1 in hyperbolic 3-space, and special Lagrangian submanifolds.This new edition contains the author''s recent work on the LawsonOsserman''s problem for higher codimension, and on Chern''s problem for minimal hypersurfaces in the sphere. Both Chern''s problem and LawsonOsserman''s problem are important problems in minimal surface theory which are still unsolved. In addition, some new techniques were developed to address those problems in detail, which are of interest in the field of geometric analysis.Readership: Researchers and graduate students in differential geometry.

The first of two volumes on the qualitative theory of foliations, this comprehensive work has something to offer to a broad spectrum of readers, from beginners to advanced students and professional researchers. Packed with a wealth of illustrations and copious examples at varying degrees of difficulty, this highly-accessible text provides the first full treatment in the literature of the theory of levels for foliated manifolds of codimension one. It would make an elegant supplementary text for a topics course at the advanced graduate level.

This is the second of two volumes on the qualitative theory of foliations. For this volume, the authors have selected three special topics: analysis on foliated spaces, characteristic classes of foliations, and foliated manifolds. Each of these is an example of deep interaction between foliation theory and some other highly-developed area of mathematics. In all cases, the authors present useful, in-depth introductions, which lead to further study using the extensive available literature. This comprehensive volume has something to offer a broad spectrum of readers: from beginners to advanced students to professional researchers. It contains exercises and many illustrations. The book would make an elegant supplementary text for a topics course at the advanced graduate level. Foliations I is Volume 23 in the AMS series, Graduate Studies in Mathematics.

El futuro de la física: las partículas elementales. La décima dimensión describe la historia como la ciencia de todo el campo de partículas elementales y cosmología dos campos que actualmente poseen una frontera comun. Los conceptos cientificos que se exponen en el libro se han simplificado para que el lector conozca y entienda los fascinantes secretos del universo.