Results 271 to 280 of about 221,597 (311)
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Proceedings of the London Mathematical Society, 1987
Let A be a resolvent positive (linear) operator (i.e., \((\lambda -A)^{- 1}\) exists and is positive for \(\lambda >\lambda_ 0)\) on a Banach lattice E. Even though no norm condition on the resolvent is demanded, a theory is developed which - to a large extent - is analogous to the theory of positive \(C_ 0\)-semigroups.
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Let A be a resolvent positive (linear) operator (i.e., \((\lambda -A)^{- 1}\) exists and is positive for \(\lambda >\lambda_ 0)\) on a Banach lattice E. Even though no norm condition on the resolvent is demanded, a theory is developed which - to a large extent - is analogous to the theory of positive \(C_ 0\)-semigroups.
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POSITIONING PATIENTS in the OPERATING ROOM
AJN, American Journal of Nursing, 1959is entirely dependent on the surgi_cal team for his comfort and safety. The surgeon is concerned with securing adequate exposure of the operative field, the anesthetist with maintaining a good airway, and the nurse with protecting the patient from injuries that might result from poor positioning.
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Positive operators on operator algebras
Rendiconti del Circolo Matematico di Palermo, 1982Si dimostra la debole compattezza delle applicazioni lineari positive dalla parte autoaggiunta di un'algebra di von Neumann su uno spazio di Banach parzialmente ordinato, separabile, normale.
Azarnia, N., Wright, J. D. M.
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GEODESICS AND OPERATOR MEANS IN THE SPACE OF POSITIVE OPERATORS
International Journal of Mathematics, 1993The set A+ of positive invertible elements of a C*-algebra has a natural structure of reductive homogeneous manifold with a Finsler metric. Because pairs of points can be joined by uniquely determined geodesics and geodesics are "short" curves, there is a natural notion of convexity: C ⊂ A+ is convex if the geodesic segment joining a, b ∈ C is ...
Corach, Gustavo +2 more
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On the Positivity of Operators
1965In this chapter, we shall explore the following theme: “Given a set of functions {u} satisfying certain side conditions, and an operator L that can he applied to the functions of this set, determine when the inequality $$ L\left( u \right) \geqq 0 $$ (1) implies that u ≧ 0.” An operator will be said to be “positive” if this condition is ...
Edwin F. Beckenbach, Richard Bellman
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Journal of Mathematical Economics and Finance, 2018
In this paper, we introduce the position operator on the space of the tempered distributions, with some its fundamental basic properties.
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In this paper, we introduce the position operator on the space of the tempered distributions, with some its fundamental basic properties.
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THE ANATOMY OF THE SURGICAL OPERATING MICROSCOPE AND OPERATING POSITIONS
Dental Clinics of North America, 1997This article explores the current status of magnification and illumination in endodontic surgery. The basic operations of the operating microscope are described in detail and common misconceptions regarding its operation are explained. Finally, the various operating positions used in endodontic microsurgery are described and illustrated.
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Random positive operator valued measures
Journal of Mathematical Physics, 2020Teiko Heinosaari +2 more
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Manifolds with $$4\frac{1}{2}$$-Positive Curvature Operator of the Second Kind
Journal of Geometric Analysis, 2022Xiaolong Li
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