000			02374nam a22001937a 4500
003			OSt
005			20241004154929.0
008			241004b |||||||| |||| 00| 0 eng d
020			_a9781071615102
100			_aBrezis, Haim
245			_aSobolev Maps to the Circle: _bFrom the perspective of analysis, geometry and topology/ _cHaim Brezis
260			_bSpringer Nature, _c2021.
300			_axxxi,530 p.
490			_aProgress in Nonlinear Differential Equations and their applications 96
500			_aPNLDE 96
520			_aThe theory of real-valued Sobolev functions is a classical part of analysis and has a wide range of applications in pure and applied mathematics. By contrast, the study of manifold-valued Sobolev maps is relatively new. The incentive to explore these spaces arose in the last forty years from geometry and physics. This monograph is the first to provide a unified, comprehensive treatment of Sobolev maps to the circle, presenting numerous results obtained by the authors and others. Many surprising connections to other areas of mathematics are explored, including the Monge-Kantorovich theory in optimal transport, items in geometric measure theory, Fourier series, and non-local functionals occurring, for example, as denoising filters in image processing. Numerous digressions provide a glimpse of the theory of sphere-valued Sobolev maps. Each chapter focuses on a single topic and starts with a detailed overview, followed by the most significant results, and rather complete proofs. The “Complements and Open Problems” sections provide short introductions to various subsequent developments or related topics, and suggest new directions of research. Historical perspectives and a comprehensive list of references close out each chapter. Topics covered include lifting, point and line singularities, minimal connections and minimal surfaces, uniqueness spaces, factorization, density, Dirichlet problems, trace theory, and gap phenomena. Sobolev Maps to the Circle will appeal to mathematicians working in various areas, such as nonlinear analysis, PDEs, geometric analysis, minimal surfaces, optimal transport, and topology. It will also be of interest to physicists working on liquid crystals and the Ginzburg-Landau theory of superconductors.
700			_aMironescu, Petru
942			_2ddc _cBK _e23rd ed. _kBREZ _m515
999			_c23129 _d23129