Results 61 to 70 of about 766 (271)
Which Operators are Similar to Partial Isometries? [PDF]
Proceedings of the American Mathematical Society, 1976 Let H \mathcal {H} denote a separable, infinite dimensional complex
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Advanced Science, EarlyView.A multilayer stretchable organic light‐emitting diode (SOLED) patch enables conformal, high‐fill‐factor phototherapeutic illumination through vertically decoupled electrodes and robust encapsulation. The textile‐based SOLED platform delivers stable skin‐contact red light for wearable phototherapy and 5‐aminolevulinic acid (ALA)‐mediated photodynamic ...
Young Hyun Son +5 more
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The C*-algebra of a partial isometry [PDF]
Proceedings of the American Mathematical Society, 2011 The universal C*-algebra generated by a partial isometry is a non-unital residually finite dimensional C*-algebra which is not exact. Many unitarily inequivalent partial isometries generating any given finite dimensional full matrix algebra are constructed. The
Brenken, Berndt, Niu, Zhuang
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Generalized inverses and similarity to partial isometries
, 2010 We obtain some results related to the problems of Badea and Mbekhta (2005) [1] concerning the similarity to partial isometries using the generalized inverses. Especially, we involve the Moore–Penrose inverses.
Mbekhta, Mostafa +3 more
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AGING MEDICINE, EarlyView.Bibliometric analysis reveals rising global research on physical activity and elderly health, dominated by developed nations. Key hotspots include healthy aging, physical activity's mental health benefits, and VR exercise interventions. Promoting physical activity is vital for healthy aging, requiring greater technology integration and research from ...
Hongman Wang +3 more
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The Anatomical Record, EarlyView.Abstract Invasive gray squirrels (Sciurus carolinensis) have replaced the native red squirrel (Sciurus vulgaris) across much of Great Britain over the last century. Several factors have been proposed to underlie this replacement, but here we investigated the potential for dietary competition in which gray squirrels have better feeding performance than ...
Philip G. Cox, Peter J. Watson
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A method for constructing idempotents in a unital algebra
Учёные записки Казанского университета: Серия Физико-математические наукиA method is proposed for constructing idempotents in a unital algebra 𝒜 using n arbitrary idempotents P1,...,Pn from this algebra. The properties of the resulting idempotents P = P(P1,...,Pn) are investigated; for n = 2 and n = 3, explicit forms of the ...
M. Khadour
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Approximation by Partial Isometries and Symmetric Approximation of Finite Frames [PDF]
, 2017 We solve the problem of best approximation by partial isometries of given rank to an arbitrary rectangular matrix, when the distance is measured in any unitarily invariant norm.
Eduardo Chiumiento +3 more
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The Anatomical Record, EarlyView.Abstract Dental microwear texture analysis (DMTA) is widely applied for inferring diet in vertebrates. Besides diet and ingesta properties, factors like wear stage and bite force may affect microwear formation, potentially leading to tooth position‐specific microwear patterns.
Daniela E. Winkler +2 more
wiley +1 more source
Partial Orders on Partial Isometries
, 2015 This paper studies three natural pre-orders of increasing generality on the set of all completely non-unitary partial isometries with equal defect indices.
Martin, Robert T. W. +2 more
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