{"product_id":"operator-theory-von-samuel-kisengo-n-benard-okelo-und-job-bonyo","title":"Operator theory","description":"\u003cp\u003eThis book is about numerical ranges and spectral  properties of Hilbert space operators which  have been of great interest to many mathematicians in the past decades. Nice properties with examples are explored. The properties of numerical range, for  example, convexity and closedness are well known as proved in the classic  Toeplitz - Hausdorff Theorem. In this book, we embark on the relationship  between the spectrum and the numerical range of an operator, in particular,  when the operator is normal. It is known that for a bounded linear operator  on a Hilbert space, the spectrum is contained in the closure of its numerical  range. For a normal operator, the numerical radius and the spectral  radius coincides with the norm of the operator. These results are actually a  contribution to the field of numerical ranges and spectra. For the reader to  understand this book, it is paramount that a deep understanding of the theory  of operators, especially on Hilbert spaces, General Topology, Functional  Analysis and Abstract Algebra be put in place. This book is useful to both  undergraduate students and postgraduate students.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783846532522\"\u003e\u003ch3\u003eProperties of Hilbert Space Operators\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783846532522","offer_id":39494585057373,"sku":"9783846532522","price":49.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/5b9be37a-b90c-4ccf-96fe-4027239d61ba.jpg?v=1774760474","url":"https:\/\/shop.autorenwelt.de\/en\/products\/operator-theory-von-samuel-kisengo-n-benard-okelo-und-job-bonyo","provider":"Autorenwelt Shop","version":"1.0","type":"link"}