{"product_id":"9789402423822","title":"Graduate Texts in Mathematics","description":"\u003ch1\u003eGraduate Texts in Mathematics\u003c\/h1\u003e \u003ch2\u003eSchmüdgen, Konrad\u003c\/h2\u003e \u003cp\u003e\u003c\/p\u003e\u003cp\u003eThis textbook provides a modern account of the theory of unbounded self‑adjoint operators on Hilbert spaces and their spectral theory, with emphasis on applications in mathematical physics (Schrödinger operators) and analysis (Dirichlet and Neumann Laplacians, Sturm–Liouville operators, and the Hamburger moment problem). The new edition has been thoroughly revised and updated and features an extensive treatment of the self‑adjoint extension theory of symmetric operators. In addition, a number of advanced special topics are presented at the textbook level, accompanied by numerous illustrative examples and exercises.\u003c\/p\u003e\n\u003cp\u003eThe main themes of the book are:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBasics of unbounded operators and fundamental self‑adjointness criteria\u003c\/li\u003e\n\u003cli\u003eSpectral integrals, spectral theorems, and functional calculus for self‑adjoint and normal operators\u003c\/li\u003e\n\u003cli\u003ePerturbations of self‑adjointness and of the spectra of self‑adjoint operators\u003c\/li\u003e\n\u003cli\u003eForms and operators\u003c\/li\u003e\n\u003cli\u003eBoundary triplets\u003c\/li\u003e\n\u003cli\u003eThe Krein transform and the Krein–Vishik–Birman theory of positive self‑adjoint extensions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWith several updates and additions, this edition further enhances an established standard reference and accessible entry point to the subject.\u003c\/p\u003e \u003ch3\u003eDetails\u003c\/h3\u003e \u003cp\u003ePublished by: Springer\u003c\/p\u003e \u003cp\u003ePublication Date: 2026-08-15\u003c\/p\u003e \u003cp\u003eFormat: Hardcover\u003c\/p\u003e \u003cp\u003eISBN-13: 9789402423822\u003c\/p\u003e \u003cp\u003eDOI: \u003c\/p\u003e \u003cp\u003eDimensions: 235cm x155cm\u003c\/p\u003e \u003cp\u003ePages: 490\u003c\/p\u003e ","brand":"Springer Netherlands","offers":[{"title":"Default Title","offer_id":49471176769676,"sku":"9789402423822","price":71.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/9545\/1788\/files\/9789402423822.jpg?v=1779935936","url":"https:\/\/fh90cf-fv.myshopify.com\/products\/9789402423822","provider":"Late Knight Books and Services, LLC","version":"1.0","type":"link"}