Найти книгу: "The Hilbert Transform of Schwartz Distributions and Applications"

This book provides a modern and up-to-date treatment of the Hilbert transform of distributions and the space of periodic distributions. Taking a simple and effective approach to a complex subject, this volume is a first-rate textbook at the graduate level as well as an extremely useful reference for mathematicians, applied scientists, and engineers. The author, a leading authority in the field, shares with the reader many new results from his exhaustive research on the Hilbert transform of Schwartz distributions. He describes in detail how to use the Hilbert transform to solve theoretical and physical problems in a wide range of disciplines; these include aerofoil problems, dispersion relations, high-energy physics, potential theory problems, and others. Innovative at every step, J. N. Pandey provides a new definition for the Hilbert transform of periodic functions, which is especially useful for those working in the area of signal processing for computational purposes. This definition could also form the basis for a unified theory of the Hilbert transform of periodic, as well as nonperiodic, functions. The Hilbert transform and the approximate Hilbert transform of periodic functions are worked out in detail for the first time in book form and can be used to solve Laplace's equation with periodic boundary conditions. Among the many theoretical results proved in this book is a Paley-Wiener type theorem giving the characterization of functions and generalized functions whose Fourier transforms are supported in certain orthants of Rn. Placing a strong emphasis on easy application of theory and techniques, the book generalizes the Hilbert problem in higher dimensions and solves it in function spaces as well as in generalized function spaces. It simplifies the one-dimensional transform of distributions; provides solutions to the distributional Hilbert problems and singular integral equations; and covers the intrinsic definition of the testing function spaces and its topology. The book includes exercises and review material for all major topics, and incorporates classical and distributional problems into the main text. Thorough and accessible, it explores new ways to use this important integral transform, and reinforces its value in both mathematical research and applied science. The Hilbert transform made accessible with many new formulas and definitions Written by today's foremost expert on the Hilbert transform of generalized functions, this combined text and reference covers the Hilbert transform of distributions and the space of periodic distributions. The author provides a consistently accessible treatment of this advanced-level subject and teaches techniques that can be easily applied to theoretical and physical problems encountered by mathematicians, applied scientists, and graduate students in mathematics and engineering. Introducing many new inversion formulas that have been developed and applied by the author and his research associates, the book: * Provides solutions to the distributional Hilbert problem and singular integral equations * Focuses on the Hilbert transform of Schwartz distributions, giving intrinsic definitions of the space H(D) and its topology * Covers the Paley-Wiener theorem and provides many important theoretical results of importance to research mathematicians * Provides the characterization of functions and generalized functions whose Fourier transforms are supported in certain orthants of Rn * Offers a new definition of the Hilbert transform of the periodic function that can be used for computational purposes in signal processing * Develops the theory of the Hilbert transform of periodic distributions and the approximate Hilbert transform of periodic distributions * Provid

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In TRANSFORMATA (Cartea 1 din Memoriile unui vampir), Caitlin Paine, de 18 ani, se treze?te scoasa cu for?a din frumoasa ei suburbie ?i for?ata sa urmeze un periculos liceu din ora?ul New York, cand mama ei se muta din nou. Singura raza de lumina in noile ei imprejurimi este Jonah, un nou coleg care o place la prima vedere. Dar, inainte ca iubirea lor sa poata inflori, Caitlin descopera dintr-o data ca se schimba. Ea este cople?ita de o putere supraomeneasca, o sensibilitate la lumina, o dorin?a de a se hrani – de sentimente pe care nu le in?elege. Ea cauta raspunsuri la ceea ce i se intampla, ?i poftele ei o duc la locul nepotrivit, la momentul nepotrivit. Ochii ei se deschid catre o lume ascunsa, chiar sub picioarele ei, inflorind in subteranele ora?ului New York. Ea se treze?te prinsa intre doua sabaturi periculoase, chiar in mijlocul unui razboi intre vampiri. Acesta este momentul cand Caitlin il intalne?te pe Caleb, un vampir misterios ?i puternic care o salveaza de for?ele intunericului. El are nevoie de ajutorul ei, are nevoie ca ea sa-l conduca la legendarul artefact pierdut. ?i ea are nevoie de el pentru raspunsuri ?i pentru protec?ie. Impreuna, ei vor trebui sa raspunda la o intrebare cruciala: cine a fost tatal ei adevarat? Dar Caitlin se treze?te prinsa intre doi barba?i, caci ?i altceva apare intre ei: o dragoste interzisa. O dragoste intre rase care le va risca vie?ile amandurora, si ii va forta sa decida daca sa ri?te totul unul pentru altul…