منابع مشابه
Do Instantons Like a Colorful Background?
We investigate chiral symmetry breaking and color symmetry breaking in QCD. The effective potential of the corresponding scalar condensates is discussed in the presence of non-perturbative contributions from the semiclassical one-instanton sector. We concentrate on a color singlet scalar background which can describe chiral condensation, as well as a color octet scalar background which can gene...
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Combining Ky Fan’s theorem with ideas of Greene and Matoušek we prove a generalization of Dol’nikov’s theorem. Using another variant of the Borsuk-Ulam theorem due to Bacon and Tucker, we also prove the presence of all possible completely multicolored t-vertex complete bipartite graphs in t-colored t-chromatic Kneser graphs and in several of their relatives. In particular, this implies a genera...
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Department of Mathematics, Department of Economics, and Center for the Study of Rationality, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel. e-mail: [email protected] web page: http://www.ma.huji.ac.il/hart Department of Mathematics and Center for the Study of Rationality, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel. e-mail: [email protected] Department of Mathe...
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Nonlinearities provide a neverending challenge to systems and control. We savor linear systems since we have a good understanding of how they behave, and there is much we can do to analyze and predict their performance. As we move away from linearity, we need to scrutinize each nonlinearity that we encounter to assess its benefi t or detriment in terms of what we wish to achieve. The first issu...
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2007
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s10052-006-0178-2