Results 291 to 300 of about 5,122,542 (341)

The Complexity of Generalized Center Problem

Qualitative Theory of Dynamical Systems, 2015
It is studied the complexity of the generalized center problem by looking for the lower bounds of the maximal possible saddle order \(M(p,q,n)\) of planar polynomial differential equations \[ \dot{x}= px+P(x,y),\quad \dot{y}=-qy+ Q(x,y), \] where \(p\) and \(q\) are positive integers such that the greatest common divisor \((p,q)=1\), and \(P\) and \(Q\)
Dong, Guangfeng, Liu, Changjian, Yang, Jiazhong   +2 more
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Variational Aspects of the Two-Center Problem

Archive for Rational Mechanics and Analysis, 2022
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Syzygy sequences of the -center problem

Ergodic Theory and Dynamical Systems, 2016
The purpose of this paper is to consider the$N$-center problem with collinear centers, to identify its syzygy sequences that can be realized by minimizers of the Lagrangian action functional and to count the number of such syzygy sequences. In particular, we show that the number of such realizable syzygy sequences of length$\ell$greater than or equal ...
Chen, Kuo-Chang, Yu, Guowei
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Topology of the Two Fixed Centers Problem

Celestial Mechanics and Dynamical Astronomy, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Cordero, A., Martínez Alfaro, J., Vindel, P.   +2 more
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The Complexity Analysis of the Inverse Center Location Problem

Journal of Global Optimization, 1999
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Cai, M. C., Yang, X. G., Zhang, J. Z.
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Many‐centered and one‐centered plethysms in the problem of many centers

International Journal of Quantum Chemistry, 1975
AbstractThe concept of a “multi‐centered plethysm” for multinuclear problems is defined and studied. Schemes of links of atoms in molecules or complexes and corresponding schemes of the group reductions are considered.
B. A. Men, P. T. Varshavsky, A. N. Men
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Problem Centered Systems Therapy of the Family*

Journal of Marital and Family Therapy, 1981
The demands upon clinicians, teachers and researchers in the family therapy field all point to the need for clear descriptions of conceptual orientations and the specifics of the therapy process. The model presented in this article grew out of research and clinical work which led to a shift in focus from specific therapist interventions to the major ...
Nathan B. Epstein, Duane S. Bishop
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An Analysis of the Critical Problem of Trauma Center Reimbursement

The Journal of Trauma: Injury, Infection, and Critical Care, 1990
There is a widespread perception that many trauma centers are poorly reimbursed, and many hospitals that once cared for trauma victims no longer do so, primarily for financial reasons. The problem is blamed on both uninsured and underinsured patients, but data supporting this perception are lacking. To determine the validity of these perceptions and to
A B, Eastman, C L, Rice, G, Bishop, J D, Richardson   +3 more
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On some Ramifications of the Center of Shear Problem

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 1992
AbstractThis note generalizes an earlier analysis of the shear center and twist center problem within the framework of a suitably formulated mixed boundary value problem of three‐dimensional linear elasticity, by the consideration of more general boundary conditions than in [1], by a significant complementation of upper and lower bound formulas in [2],
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