In its 114th year, Billboard remains the world's premier weekly music publication and a diverse digital, events, brand, content and data licensing platform. Billboard publishes the most trusted charts and offers unrivaled reporting about the latest music, video, gaming, media, digital and mobile entertainment issues and trends.

From the reviews: "The author has attempted an ambitious and most commendable project. [...] The book contains much material that has not previously appeared in this format. The writing is clean and clear and the exposition is well motivated. [...] This book is, all in all, a very admirable work and a valuable addition to the literature." Mathematical Reviews

{\it Elements of Operatory Theory} is aimed at graduate students as well as a new generation of mathematicians and scientists who need to apply operator theory to their field. Written in a user-friendly, motivating style, fundamental topics are presented in a systematic fashion, i.e., set theory, algebraic structures, topological structures, Banach spaces, Hilbert spaces, culminating with the Spectral Theorem, one of the landmarks in the theory of operators on Hilbert spaces. The exposition is concept-driven and as much as possible avoids the formula-computational approach. Key features of this largely self-contained work include: * required background material to each chapter * fully rigorous proofs, over 300 of them, are specially tailored to the presentation and some are new * more than 100 examples and, in several cases, interesting counterexamples that demonstrate the frontiers of an important theorem * over 300 problems, many with hints * both problems and examples underscore further auxiliary results and extensions of the main theory; in this non-traditional framework, the reader is challenged and has a chance to prove the principal theorems anew This work is an excellent text for the classroom as well as a self-study resource for researchers. Prerequisites include an introduction to analysis and to functions of a complex variable, which most first-year graduate students in mathematics, engineering, or another formal science have already acquired. Measure theory and integration theory are required only for the last section of the final chapter.

In its 114th year, Billboard remains the world's premier weekly music publication and a diverse digital, events, brand, content and data licensing platform. Billboard publishes the most trusted charts and offers unrivaled reporting about the latest music, video, gaming, media, digital and mobile entertainment issues and trends.

Por amor a Dios y a todos sin excepción, empezaré por decir a ustedes que éste libro, que hoy se presenta, lo escribí con uno y varios fi nes, el primero: la obediencia y otro de ellos: conducir a mis lectores hacia la verdadera fuente de la Palabra Divina, la Biblia o Dios. "Escribe un libro" se me dijo por escrito y en la Biblia misma; sentí que era para mí el mensaje. Entre sorprendida y asustada, volví a abrir la Sagrada Escritura, apareció un segundo mensaje y así hasta completar un corto diálogo mental, en el que Él ordenó y yo contestaba........ el cuál fi gura en las primeras páginas de éste volumen. Me entregué a su escritura de mañana, noche o madrugada. Cuatro veces escribí la historia del Pueblo de Dios, porque Él así lo quiso y permitió una manuscrita, la segunda a máquina, la tercera en computadora y la cuarta: lo imprimí. Siempre puliendo y repuliendo lo ya escrito. Hubo momentos en que sentía un escalofrío o como hormigueo que recorría mi ser, lo percibía como aprobación. Aquello me daba ánimos para continuar. Al principio pensé concretarme únicamente a las mujeres de la Santa Historia, pero me di cuenta que Él quería algo más. "Escribiré la historia de tu Pueblo Padre, ayúdame." Yo hablaba con el pensamiento. Investigué primero en la Sagrada Biblia, en amarillentos y empolvados libro viejos, toqué puertas, me introduje en el texto hasta su propia médula y la pluma corría por las hojas. Me adentré en la historia como supongo los pintores se introducen en el paisaje que pintan y hasta pueden percibir el perfume de las fl orecillas silvestres de su propio cuadro, o los escultores sienten los latidos de los cuerpos que modelan. No soy muy buena escribiendo, pero lo hice con tanto amor y fe y eso es lo que es éste libro: un mensaje de amor y fe. Graciela Padilla de Amador

In its 114th year, Billboard remains the world's premier weekly music publication and a diverse digital, events, brand, content and data licensing platform. Billboard publishes the most trusted charts and offers unrivaled reporting about the latest music, video, gaming, media, digital and mobile entertainment issues and trends.

In its 114th year, Billboard remains the world's premier weekly music publication and a diverse digital, events, brand, content and data licensing platform. Billboard publishes the most trusted charts and offers unrivaled reporting about the latest music, video, gaming, media, digital and mobile entertainment issues and trends.