منابع مشابه
A Greek Bronze Vase
When we think of Greek vases we generally have in mind Greek pottery, which has survived in quantity. Clay, one of the most perishable of materials, becomes one of the most indestructible in the firing. In fact, much of our knowledge of ancient civilizations is derived from the potsherds that are found in successive layers on ancient sites; a pot, once fired, may break into a hundred pieces, bu...
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Archaic Athenian vase-painting of the sixth century BC exhibits visual narrative phenomena that are very similar to the verbal narrative patterns of traditional, orally composed poetry: in the poetry these are the familiar formulaic phrases and themes analyzed by Milman Parry and the ensuing train of oral theorists; in the art they take the form of repetitious iconography and recurrent composit...
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Recently, structural symmetry breaking (SSB), a new technique for breaking all piecewise variable and value symmetry in constraint satisfaction problems (CSPs), was introduced. As of today, it is unclear whether the heavy symmetry filtering that SSB performs is at all worthwhile. This paper has two aims: First, we assess the feasibility of SSB. To this end, we introduce the first random benchma...
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We present a general method for dynamically posting symmetry breaking constraints during search. The basic idea is very simple. Given any set of symmetry breaking constraints, if during search a symmetry of one of these constraints is entailed and this is consistent with previously posted symmetry breaking constraints, then we post this constraint. We illustrate the method with two examples whe...
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ژورنال
عنوان ژورنال: The American Mathematical Monthly
سال: 1922
ISSN: 0002-9890
DOI: 10.2307/2298893