R. Courant

Difference Methods for Initial Value Problems is a book written by Robert D. Richtmyer and published as part of the Interscience Tracts in Pure and Applied Mathematics series. The book focuses on the use of difference methods for solving initial value problems in mathematics. It covers topics such as the numerical solution of partial differential equations, the stability of difference schemes, and the accuracy of numerical methods. The book is intended for graduate students and researchers in mathematics and engineering who are interested in numerical methods for solving initial value problems. It provides a comprehensive overview of the subject, including detailed explanations of the underlying theory and practical applications. The book is written in a clear and concise style, making it accessible to readers with a range of mathematical backgrounds. Overall, Difference Methods for Initial Value Problems is an essential resource for anyone interested in numerical methods for solving initial value problems.Additional Editor Is J. J. Stoker.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

""Fourier Analysis On Groups"" is a comprehensive mathematical text written by Walter Rudin, published as part of the Interscience Tracts in Pure and Applied Mathematics series. The book is aimed at graduate students and researchers in the field of mathematical analysis and covers the theory of Fourier analysis on locally compact groups. The text begins with an introduction to the basic concepts of group theory and harmonic analysis, before delving into the more advanced topics of Fourier transforms and Plancherel's theorem. Rudin also covers topics such as convolution, the Fourier-Stieltjes algebra, and the Fourier transform on non-abelian groups. Throughout the book, Rudin provides clear and concise explanations of the mathematical concepts, accompanied by numerous examples and exercises to aid the reader's understanding. The text is well-organized and easy to follow, making it a valuable resource for both students and researchers in the field of Fourier analysis on groups. Overall, ""Fourier Analysis On Groups"" is a highly regarded mathematical text that has been praised for its clarity, depth, and rigor. It is an essential reference for anyone interested in the theory of Fourier analysis on groups and its applications in mathematical analysis and related fields.Additional Editor Is J. J. Stoker.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

Introduction to Algebraic Geometry is a comprehensive textbook written by Serge Lang that explores the fundamental concepts of algebraic geometry. The book is part of the Interscience Tracts in Pure and Applied Mathematics series and is the fifth volume in the series. The book is divided into three parts: the first part provides an introduction to the basic concepts of algebraic geometry, including algebraic sets, varieties, and morphisms. The second part delves deeper into the theory of algebraic curves, covering topics such as intersection theory, Riemann-Roch theorem, and Abel's theorem. The third part covers the theory of algebraic surfaces, including the classification of surfaces, the Hodge index theorem, and the Enriques-Kodaira classification. Throughout the book, Lang emphasizes the importance of understanding the geometric intuition behind the algebraic concepts. The book is written in a clear and concise manner, making it accessible to both graduate students and researchers in the field of mathematics. It also includes numerous examples and exercises to reinforce the concepts covered in each chapter. Overall, Introduction to Algebraic Geometry is an essential resource for anyone interested in learning about the theory of algebraic geometry. It provides a solid foundation for further study in the field and is a valuable reference for researchers working in related areas of mathematics.Additional Editor Is J. J. Stoker.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

It has always been a temptation for mathematicians to present the crystallized product of their thoughts as a deductive general theory and to relegate the individual mathematical phenomenon into the role of an example. The reader who submits to the dogmatic form will be easily indoctrinated. Enlightenment, however, must come from an understanding of motives; live mathematical development springs from specific natural problems which can be easily understood, but whose solutions are difficult and demand new methods of more general significance. The present book deals with subjects of this category. It is written in a style which, as the author hopes, expresses adequately the balance and tension between the individuality of mathematical objects and the generality of mathematical methods. The author has been interested in Dirichlet's Principle and its various applications since his days as a student under David Hilbert. Plans for writing a book on these topics were revived when Jesse Douglas' work suggested to him a close connection between Dirichlet's Principle and basic problems concerning minimal sur- faces. But war work and other duties intervened; even now, after much delay, the book appears in a much less polished and complete form than the author would have liked.

47 brauchen nur den Nenner n so groB zu wahlen, daB das Intervall [0, Ijn] kleiner wird als das fragliche Intervall [A, B], dann muB mindestens einer der Bruche mIn innerhalb des Intervalls liegen. Also kann es kein noch so kleines Intervall auf der Achse geben, das von rationalen Punkten frei ware. Es folgt weiterhin, daB es in jedem Intervall unendlich viele rationale Punkte geben muB; denn wenn es nur eine endliche Anzahl gabe, so konnte das Intervall zwischen zwei beliebigen benachbarten Punkten keine rationalen Punkte enthalten, was, wie wir eben sahen, unmoglich ist. § 2. Inkommensurable Strecken, irrationale Zahlen und der Grenzwertbegriff 1. Einleitung Vergleicht man zwei Strecken a und b hinsichtlich ihrer GroBe, so kann es vor- kommen, daB a in b genau r-mal enthalten ist, wobei r eine ganze Zahl darstellt. In diesem Fall konnen wir das MaB der Strecke b dUrch das von a ausdrucken, indem wir sagen, daB die Lange von b das r-fache der Lange von a ist. Oder es kann sich zeigen, daB man, wenn auch kein ganzes Vielfaches von a genau gleich b ist, doch a in, sagen wir, n gleiche Strecken von der Lange ajn teilen kann, so daB ein ganzes Vielfaches m der Strecke ajn gleich b wird: b=!!!...-a.

VIII über den Inhalt im einzelnen unterrichtet das ausführliche Ver­ zeichnis. Zur Form ist etwas Grundsätzliches zu sagen: Das klassische Ideal einer gewissermaßen atomistischen Auffassung der Mathematik ver­ langt, den Stoff in Form von Voraussetzungen, Sätzen und Beweisen zu kondensieren. Dabei ist der innere Zusammenhang und die Motivierung der Theorie nicht unmittelbar Gegenstand der Darstellung. In kom­ plementärer Weise kann man ein mathematisches Gebiet als stetiges Gewebe von Zusammenhängen betrachten, bei dessen Beschreibung die Methode und die Motivierung in den Vordergrund treten und die Kri­ stallisierung der Einsichten in isolierte scharf umrissene Sätze erst eine sekundäre Rolle spielt. Wo eine Synthese beider Auffassungen untunlich schien, habe ich den zweiten Gesichtspunkt bevorzugt. New Rochelle, New York, 24. Oktober 1937. R. Courant. Inhaltsverzeichnis. Erstes Kapitel. Vorbereitung. - Grundbegriffe. § I. Orientierung über die Mannigfaltigkeit der Lösungen 2 1. Beispiele S. 2. - 2. Differentialgleichungen zu gegebenen Funk­ tionenscharen und -familien S. 7. § 2. Systeme von Differentialgleichungen ............... 10 1. Problem der Äquivalenz von Systemen und einzelnen Differential­ 2. Bestimmte, überbestimmte, unterbestimmte gleichungen S. 10. - Systeme S. 12. § J. Integrationsmethoden bei speziellen Differentialgleichungen. . . . . . 14 1. Separation der Variablen S. 14. - 2. Erzeugung weiterer Lösungen durch Superposition. Grundlösung der Wärmeleitung. Poissons Integral S.16. § 4. Geometrische Deutung einer partiellen Differentialgleichung erster Ord­ nung mit zwei unabhängigen Variablen. Das vollständige Integral . . 18 1. Die geometrische Deutung einer partiellen Differentialgleichung erster Ordnung S. 18. - 2. Dasvollständige Integral S. 19. - 3. Singuläre Integrale S. 20.

Dieser Buchtitel ist Teil des Digitalisierungsprojekts Springer Book Archives mit Publikationen, die seit den Anfängen des Verlags von 1842 erschienen sind. Der Verlag stellt mit diesem Archiv Quellen für die historische wie auch die disziplingeschichtliche Forschung zur Verfügung, die jeweils im historischen Kontext betrachtet werden müssen. Dieser Titel erschien in der Zeit vor 1945 und wird daher in seiner zeittypischen politisch-ideologischen Ausrichtung vom Verlag nicht beworben.

Dieser Buchtitel ist Teil des Digitalisierungsprojekts Springer Book Archives mit Publikationen, die seit den Anfängen des Verlags von 1842 erschienen sind. Der Verlag stellt mit diesem Archiv Quellen für die historische wie auch die disziplingeschichtliche Forschung zur Verfügung, die jeweils im historischen Kontext betrachtet werden müssen. Dieser Titel erschien in der Zeit vor 1945 und wird daher in seiner zeittypischen politisch-ideologischen Ausrichtung vom Verlag nicht beworben.