Results 351 to 360 of about 2,669,618 (392)
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Ganglioneuroma: To Operate or Not to Operate
European Journal of Pediatric Surgery, 2013Ganglioneuroma (GN) is a benign, differentiated variety of neurogenic tumor. It is often asymptomatic and may be diagnosed by serendipity. Surgical removal is the treatment of choice. However, it has been suggested that postoperative complications and sequelae might outweigh the benefits of this approach. The purpose of the present study was to examine
Sara Hernández A. Martín +8 more
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Operations and compositions in transrecursive operators
Cybernetics and Systems Analysis, 1994Earlier, the authors introduced classes of alphabetic operators that have greater computational possibilities than classical algorithms. In Dokl. Akad. Nauk SSSR 321, No. 5, 876-879 (1991), they gave a uniform procedure for obtaining such alphabetic operators, which will be called transrecursive operators in what follows.
Mark Burgin, Yu. M. Borodyanskii
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American Journal of Sports Medicine, 2018
Background: Acromioclavicular (AC) instability is a frequent injury affecting young and athletic populations. Symptomatic, high-grade dislocations may be managed by a myriad of operative techniques that utilize different grafts to achieve reduction ...
A. Gowd +6 more
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Background: Acromioclavicular (AC) instability is a frequent injury affecting young and athletic populations. Symptomatic, high-grade dislocations may be managed by a myriad of operative techniques that utilize different grafts to achieve reduction ...
A. Gowd +6 more
semanticscholar +1 more source
On operator algebras and operator ranges [PDF]
Integral Equations and Operator Theory, 1986 Some further results are given and some questions raised concerning operator algebras of countable range multiplicity. An example is given of an abelian range cyclic algebra that does not have finite strict multiplicity. On the other hand it is shown that every uniformly closed abelian range cyclic algebra is strictly cyclic.
Peter Rosenthal, W. E. Longstaff
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2014
Operation RUVANDIZ-SCHLUCHT (ROWANDUZ GORGE) is said to have been a detailed scheme originally submitted to Hans-Otto Wagner of Abwehr II in 1941 by Paul Leverkuehn of KONO in Istanbul for a 2–3-man parachute team to carry out the demolition of bridges on the 185 km-long, strategic asphalt road, known even today as the Hamilton Road, constructed by the
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Operation RUVANDIZ-SCHLUCHT (ROWANDUZ GORGE) is said to have been a detailed scheme originally submitted to Hans-Otto Wagner of Abwehr II in 1941 by Paul Leverkuehn of KONO in Istanbul for a 2–3-man parachute team to carry out the demolition of bridges on the 185 km-long, strategic asphalt road, known even today as the Hamilton Road, constructed by the
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Pituitary Incidentaloma: to Operate or Not to Operate ?
Acta Chirurgica Belgica, 2012The wide use of sophisticated imaging techniques has led to the discovery of asymptomatic pituitary lesions, which are called 'incidentalomas'. Their global prevalence averages 10% whereas that of macroadenomas (> 10 mm) is less than 1%. The most frequently encountered lesions are non-functioning adenomas followed by Rathke's cleft cysts. Physiological
Julian Donckier, Th Gustin
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American Journal of Mathematics, 1952
A mathematical formulation of the famous Heisenberg uncertainty principle is that a certain pair of linear transformations P and Q satisfies, after suitable normalizations, the equation PQ - QP = 1. It is easy enough to produce a concrete example of this behavior; consider L2(-∞, +∞) and let P and Q be the differentiation transformation and the ...
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A mathematical formulation of the famous Heisenberg uncertainty principle is that a certain pair of linear transformations P and Q satisfies, after suitable normalizations, the equation PQ - QP = 1. It is easy enough to produce a concrete example of this behavior; consider L2(-∞, +∞) and let P and Q be the differentiation transformation and the ...
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Operations on Closure Operators
1995Despite the powerful continuity condition, the notion of closure operator is very general. It is therefore important to provide tools for improving a given operator. Fortunately, there is a natural lattice structure for closure operators that allows us to distinguish between properties stable under meet (idempotency, hereditariness, productivity), and ...
W. Tholen, D. Dikranjan
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ON REDUCTIVE OPERATORS AND OPERATOR ALGEBRAS
Mathematics of the USSR-Izvestiya, 1976We prove a theorem on the structure of weakly closed reductive operator algebras. The proof essentially relies on a known result of V. I. Lomonosov on transitive operator algebras containing a nonzero compact operator. We deduce a number of corollaries which apply to the reductivity problem.Bibliography: 20 titles.
V S Šul'man, A I Loginov
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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.
N. Azarnia +3 more
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