منابع مشابه
Optimum Allocation of Centers in Transportation Networks by Means of Fuzzy Graph Bases
In this paper the questions of defining the optimum allocation of centers in fuzzy transportation networks are observed by the minimax criterion. It is supposed that the information received from the geographical information system is presented as a fuzzy graph. In this case the task of defining optimum allocation of the centers transforms into the task of defining the fuzzy set of graph bases....
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The toric ideals of 3 × 3 transportation polytopes Trc are quadratically generated. The only exception is the Birkhoff polytope B3. If Trc is not a multiple of B3, these ideals even have square-free quadratic initial ideals. This class contains all smooth 3 × 3 transportation polytopes.
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This paper illustrates some work in progress on 3-dimensional transportation problems,of format r×s×t say. Following Conti and Traverso, a suitable Gröbner basis is sought for, which is hard to be calculated by means of Buchberger algorithm. A different approach involving graph theory makes the calculation tractable when r = s = t = 3 (and in fact whenever 3 ∈ {r, s, t}). Introduction The aim o...
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In this paper the questions of the definition of the centers optimum allocation in fuzzy transportation networks are observed by the minimax criterion. It is supposed that the information received from GIS is presented like a fuzzy graph. In this case the task of the definition of the centers optimum allocation transforms into the task of the definition of the graph vitality fuzzy set. The meth...
متن کاملG-Frames, g-orthonormal bases and g-Riesz bases
G-Frames in Hilbert spaces are a redundant set of operators which yield a representation for each vector in the space. In this paper we investigate the connection between g-frames, g-orthonormal bases and g-Riesz bases. We show that a family of bounded operators is a g-Bessel sequences if and only if the Gram matrix associated to its denes a bounded operator.
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ژورنال
عنوان ژورنال: Applicationes Mathematicae
سال: 1966
ISSN: 1233-7234,1730-6280
DOI: 10.4064/am-9-4-357-389