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Was sind und was sollen die Zahlen? Stetigkeit und Irrationale Zahlen Originaltexte mit ausführlichen mathematischen und historischen Kommentaren von Stefan Müller-Stach Die beiden Bücher „Was sind und was sollen die Zahlen?“ (1888) und „Stetigkeit und Irrationale Zahlen“ (1872) sind Dedekinds Beiträge zu den Grundlagen der Mathematik; er legte darin die Grundsteine der Mengenlehre und der Theorie der reellen und natürlichen Zahlen. Diese Schriften sind aus der modernen Mathematik nicht mehr wegzudenken. Dennoch wurde die Leistung Dedekinds nicht immer entsprechend gewürdigt, und der Inhalt dieser Bücher ist auch heute noch vielen Mathematikern wenig bekannt. Dieses Buch enthält neben den Originaltexten eine ausführliche Erklärung der beiden Schriften und eine Interpretation in moderner Sprache, sowie eine kurze Biografie und eine Abschrift des berühmten Briefs an H. Keferstein. Dadurch bietet dieses Buch einen faszinierenden Einblick in das Leben und Schaffen dieses wegweisenden Wissenschaftlers und stellt sein Werk in Beziehung zu großen Zeitgenossen wie Cantor, Dirichlet, Frege, Hilbert, Kronecker und Riemann. Der Autor Richard Dedekind (1831-1916) war einer der bedeutendsten Mathematiker des 19. Jahrhunderts. Seine Arbeiten hatten weitreichende Auswirkungen in den Grundlagen der Mathematik, aber auch insbesondere in der Algebraischen Zahlentheorie und der Algebra. Sein Werk beeinflusste viele andere Wissenschaftler bis in die heutige Zeit und ist aus der Mathematik nicht mehr wegzudenken. Der Herausgeber Prof. Dr. Stefan Müller-Stach ist am Institut für Mathematik der Johannes Gutenberg-Universität Mainz tätig. Er arbeitet in der Arithmetischen und Algebraischen Geometrie.

Mathematics. --- History. --- Number theory. --- History of Mathematical Sciences. --- Number Theory.

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This book casts the theory of periods of algebraic varieties in the natural setting of Madhav Nori’s abelian category of mixed motives. It develops Nori’s approach to mixed motives from scratch, thereby filling an important gap in the literature, and then explains the connection of mixed motives to periods, including a detailed account of the theory of period numbers in the sense of Kontsevich-Zagier and their structural properties. Period numbers are central to number theory and algebraic geometry, and also play an important role in other fields such as mathematical physics. There are long-standing conjectures about their transcendence properties, best understood in the language of cohomology of algebraic varieties or, more generally, motives. Readers of this book will discover that Nori’s unconditional construction of an abelian category of motives (over fields embeddable into the complex numbers) is particularly well suited for this purpose. Notably, Kontsevich's formal period algebra represents a torsor under the motivic Galois group in Nori's sense, and the period conjecture of Kontsevich and Zagier can be recast in this setting. Periods and Nori Motives is highly informative and will appeal to graduate students interested in algebraic geometry and number theory as well as researchers working in related fields. Containing relevant background material on topics such as singular cohomology, algebraic de Rham cohomology, diagram categories and rigid tensor categories, as well as many interesting examples, the overall presentation of this book is self-contained.

Number theory. --- Algebraic geometry. --- K-theory. --- Algebraic topology. --- Category theory (Mathematics). --- Homological algebra. --- Associative rings. --- Rings (Algebra). --- Number Theory. --- Algebraic Geometry. --- K-Theory. --- Algebraic Topology. --- Category Theory, Homological Algebra. --- Associative Rings and Algebras.

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This book casts the theory of periods of algebraic varieties in the natural setting of Madhav Nori’s abelian category of mixed motives. It develops Nori’s approach to mixed motives from scratch, thereby filling an important gap in the literature, and then explains the connection of mixed motives to periods, including a detailed account of the theory of period numbers in the sense of Kontsevich-Zagier and their structural properties. Period numbers are central to number theory and algebraic geometry, and also play an important role in other fields such as mathematical physics. There are long-standing conjectures about their transcendence properties, best understood in the language of cohomology of algebraic varieties or, more generally, motives. Readers of this book will discover that Nori’s unconditional construction of an abelian category of motives (over fields embeddable into the complex numbers) is particularly well suited for this purpose. Notably, Kontsevich's formal period algebra represents a torsor under the motivic Galois group in Nori's sense, and the period conjecture of Kontsevich and Zagier can be recast in this setting. Periods and Nori Motives is highly informative and will appeal to graduate students interested in algebraic geometry and number theory as well as researchers working in related fields. Containing relevant background material on topics such as singular cohomology, algebraic de Rham cohomology, diagram categories and rigid tensor categories, as well as many interesting examples, the overall presentation of this book is self-contained.

Number theory. --- Algebraic geometry. --- K-theory. --- Algebraic topology. --- Category theory (Mathematics). --- Homological algebra. --- Associative rings. --- Rings (Algebra). --- Number Theory. --- Algebraic Geometry. --- K-Theory. --- Algebraic Topology. --- Category Theory, Homological Algebra. --- Associative Rings and Algebras.

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Geometry, Algebraic --- Hodge theory --- Torelli theorem. --- Géométrie algébrique --- Théorie de Hodge --- Geometry, Algebraic. --- Hodge theory. --- Torelli's theorem --- Curves, Algebraic --- Jacobians --- Complex manifolds --- Differentiable manifolds --- Homology theory --- Algebraic geometry --- Geometry --- Géométrie algébrique --- Théorie de Hodge --- Torelli theorem

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