TY - BOOK AU - Bonsall,F.F. AU - Duncan,J. TI - Numerical Ranges of Operators on Normed Spaces and of Elements of Normed Algebras T2 - London Mathematical Society Lecture Note Series SN - 9781107359895 (ebook) AV - QA322 .B65 U1 - 512/.55 n/a PY - 1971/// CY - Cambridge PB - Cambridge University Press KW - Normed linear spaces KW - Banach algebras KW - Linear operators N1 - Title from publisher's bibliographic system (viewed on 16 Oct 2015) N2 - The theory of the numerical range of a linear operator on an arbitrary normed space had its beginnings around 1960, and during the 1970s the subject has developed and expanded rapidly. This book presents a self-contained exposition of the subject as a whole. The authors develop various applications, in particular to the study of Banach algebras where the numerical range provides an important link between the algebraic and metric structures UR - http://dx.doi.org/10.1017/CBO9781107359895 ER -