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Graphs On Surfaces And Their Applications

Author: Sergei K. Lando
Publisher: Springer Science & Business Media
ISBN: 3540383611
Size: 45.65 MB
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Graphs drawn on two-dimensional surfaces have always attracted researchers by their beauty and by the variety of difficult questions to which they give rise. The theory of such embedded graphs, which long seemed rather isolated, has witnessed the appearance of entirely unexpected new applications in recent decades, ranging from Galois theory to quantum gravity models, and has become a kind of a focus of a vast field of research. The book provides an accessible introduction to this new domain, including such topics as coverings of Riemann surfaces, the Galois group action on embedded graphs (Grothendieck's theory of "dessins d'enfants"), the matrix integral method, moduli spaces of curves, the topology of meromorphic functions, and combinatorial aspects of Vassiliev's knot invariants and, in an appendix by Don Zagier, the use of finite group representation theory. The presentation is concrete throughout, with numerous figures, examples (including computer calculations) and exercises, and should appeal to both graduate students and researchers.

Graphs On Surfaces

Author: Joanna A. Ellis-Monaghan
Publisher: Springer Science & Business Media
ISBN: 1461469716
Size: 28.64 MB
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Graphs on Surfaces: Dualities, Polynomials, and Knots offers an accessible and comprehensive treatment of recent developments on generalized duals of graphs on surfaces, and their applications. The authors illustrate the interdependency between duality, medial graphs and knots; how this interdependency is reflected in algebraic invariants of graphs and knots; and how it can be exploited to solve problems in graph and knot theory. Taking a constructive approach, the authors emphasize how generalized duals and related ideas arise by localizing classical constructions, such as geometric duals and Tait graphs, and then removing artificial restrictions in these constructions to obtain full extensions of them to embedded graphs. The authors demonstrate the benefits of these generalizations to embedded graphs in chapters describing their applications to graph polynomials and knots. Graphs on Surfaces: Dualities, Polynomials, and Knots also provides a self-contained introduction to graphs on surfaces, generalized duals, topological graph polynomials, and knot polynomials that is accessible both to graph theorists and to knot theorists. Directed at those with some familiarity with basic graph theory and knot theory, this book is appropriate for graduate students and researchers in either area. Because the area is advancing so rapidly, the authors give a comprehensive overview of the topic and include a robust bibliography, aiming to provide the reader with the necessary foundations to stay abreast of the field. The reader will come away from the text convinced of advantages of considering these higher genus analogues of constructions of plane and abstract graphs, and with a good understanding of how they arise.

Medical Image Computing And Computer Assisted Intervention Miccai 2015

Author: Nassir Navab
Publisher: Springer
ISBN: 3319245740
Size: 17.80 MB
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The three-volume set LNCS 9349, 9350, and 9351 constitutes the refereed proceedings of the 18th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2015, held in Munich, Germany, in October 2015. Based on rigorous peer reviews, the program committee carefully selected 263 revised papers from 810 submissions for presentation in three volumes. The papers have been organized in the following topical sections: quantitative image analysis I: segmentation and measurement; computer-aided diagnosis: machine learning; computer-aided diagnosis: automation; quantitative image analysis II: classification, detection, features, and morphology; advanced MRI: diffusion, fMRI, DCE; quantitative image analysis III: motion, deformation, development and degeneration; quantitative image analysis IV: microscopy, fluorescence and histological imagery; registration: method and advanced applications; reconstruction, image formation, advanced acquisition - computational imaging; modelling and simulation for diagnosis and interventional planning; computer-assisted and image-guided interventions.

Extremal Polynomials And Riemann Surfaces

Author: Andrei Bogatyrev
Publisher: Springer Science & Business Media
ISBN: 3642256341
Size: 20.76 MB
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The problems of conditional optimization of the uniform (or C-) norm for polynomials and rational functions arise in various branches of science and technology. Their numerical solution is notoriously difficult in case of high degree functions. The book develops the classical Chebyshev's approach which gives analytical representation for the solution in terms of Riemann surfaces. The techniques born in the remote (at the first glance) branches of mathematics such as complex analysis, Riemann surfaces and Teichmüller theory, foliations, braids, topology are applied to approximation problems. The key feature of this book is the usage of beautiful ideas of contemporary mathematics for the solution of applied problems and their effective numerical realization. This is one of the few books where the computational aspects of the higher genus Riemann surfaces are illuminated. Effective work with the moduli spaces of algebraic curves provides wide opportunities for numerical experiments in mathematics and theoretical physics.​

Vorlesungen Ber Minimalfl Chen

Author: J.C.C. Nitsche
Publisher: Springer-Verlag
ISBN: 3642656196
Size: 71.35 MB
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Seit den Anfängen der Theorie der Minimalflächen vor mehr als zwei Jahrhunderten sind viele große Geister aller Epochen von ihrem Reize fasziniert worden. Diese Anziehungskraft liegt nicht nur in dem geome trischen Gehalt der Theorie und in ihren inspirierenden Einwirkungen auf die Entwicklung mathematischen Gedankenguts begründet, sie er klärt sich auch durch die in der Mathematik wohl nur selten erreichte Vielschichtigkeit, mit welcher in ihr sowohl experimenteller Augenschein und die Verfolgung konkreter Einzelprobleme als auch die fortschrei tende Abstraktion ursprünglich anschaulicher Begriffe und die Durch schlagskraft allgemein anwendbarer Methoden erfolgreich zum Tragen kommen. Es bestehen innige Zusammenhänge mit der lokalen und glo balen Differentialgeometrie, mit der Funktionentheorie, der Variations rechnung und der Theorie partieller Differentialgleichungen und zugleich fruchtbare Beziehungen zu vielen mathematischen Gebieten, so etwa zur Topologie, zur Maßtheorie und zur algebraischen Geometrie. Auch der Forscher in anderen Disziplinen, beispielsweise in der Elastizitäts theorie, der Strömungslehre und in allen Gebieten, bei denen die Er scheinung der Kapillarität eine Rolle spielt, wird von seiner Vertrautheit mit Minimalflächen profitieren. Vor allem aber handelt es sich um eine ästhetisch vollkommene Materie. Mit Ausnahme einiger spärlich gehaltenen Andeutungen befaßt sich die vorliegende Monographie ausschließlich mit zweidimensionalen reellen Parameterflächen im dreidimensionalen Euklidischen Raum. Eine solche Begrenzung schien aus Platzgründen und im Hinblick auf den Wunsch nach Stoffeinheitlichkeit unerläßlich. Der Kritiker kann hier freilich jedes Wort als lästige Einschränkung empfinden, wird aber hoffentlich zugestehen, daß die schönsten Perlen der Theorie dennoch in Erscheinung treten.