منابع مشابه
The Universal Net Composition Operator
Petri nets are frequently composed of given nets. Literature suggests a lot of different composition operators, for different purposes and different classes of Petri nets. Formal definitions are frequently surprisingly technical, not matching the intuitively very elegant composition of Petri nets in the framework of their graphical representation. This paper suggests the universal net compositi...
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An operator is defined that is analogous to the time translation operator except that it translates every component of a state in energy by an amount ε. A prescription for measuring expectation values of this operator is described. These measurements provide phase information that is not obtainable by other means. The similarity of this treatment with the treatment of reccurrence spectroscopy i...
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Brief Reports are accounts of completed research which do not warrant regular articles or the priority handling given to Rapid Communications; however, the same standards of scientific quality apply. (Addenda are included in Brief Reports.) A Brief Report may be no longer than four printed pages and must be accompanied by an abstract. The same publication schedule as for regular articles is fol...
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Given a directed graph, there exists a universal operator algebra and universal C∗-algebra associated to the directed graph. For finite graphs this algebra decomposes as the universal free product of some building block operator algebras. For countable directed graphs, the universal operator algebras arise as direct limits of operator algebras of finite subgraphs. Finally, a method for computin...
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We prove pointwise inequalities for the maximal operator over all the directions in R when acting on l-radial functions and on product functions. From these inequalities we deduce boundedness results on L for p > n; these can be applied to other operators, in particular to the Kakeya maximal operator.
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ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 2006
ISSN: 0264-9381,1361-6382
DOI: 10.1088/0264-9381/23/23/n01