{"product_id":"9783319611693","title":"Operator Approximant Problems Arising from Quantum Theory","description":"\u003cp\u003eThis book offers an account of a number of aspects of operator theory, mainly developed since the 1980s, whose problems have their roots in quantum theory. The research presented is in non-commutative operator approximation theory or, to use Halmos' terminology, in operator approximants. Focusing on the concept of approximants, this self-contained book is suitable for graduate courses.\u003c\/p\u003e \u003cp\u003eWhat this book is about: approximants.- Preliminaries.- Self-adjoint and positive approximants.- Commutator approximants.- Spectral, and numerical range, approximants.- Unitary, isometric and partially isometric approximation of positive operators.\u003c\/p\u003e Philip J. Maher is a former Senior lecturer in mathematics at Middlesex University.","brand":"Birkh\u0026#228;user","offers":[{"title":"Default Title","offer_id":42599883210827,"sku":"00000_00000_00000_00000","price":1960.57,"currency_code":"THB","in_stock":true}],"url":"https:\/\/kinokuniya.co.th\/products\/9783319611693","provider":"Books Kinokuniya Thailand","version":"1.0","type":"link"}