Feedback Numbers of Goldberg Snark, Twisted Goldberg Snarks and Related Graphs
نویسندگان
چکیده
منابع مشابه
The circular chromatic index of Goldberg snarks
We determine the exact values of the circular chromatic index of the Goldberg snarks, and of a related family, the twisted Goldberg snarks.
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In this paper, we study the Goldberg Snarks Gk, twist Goldberg Snarks TGk, Flower snarks Fk, and show the exact value of connected and tree domination number of them. Mathematics Subject Classification: 05C35
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The importance of diversification and risk management was recognized by a few visionaries in the early days of investing. Only in the 1950's, however, did these concepts become central. Since then, increasingly sophisticated mathematical and statistical tools have been brought to bear on the problem of estimating the aggregate risk of a portfolio. This risk depends crucially on the covariances ...
متن کاملGoldberg-Coxeter Construction for 3- and 4-valent Plane Graphs
We consider the Goldberg-Coxeter construction GCk,l(G0) (a generalization of a simplicial subdivision of the dodecahedron considered in [Gold37] and [Cox71]), which produces a plane graph from any 3or 4-valent plane graph for integer parameters k, l. A zigzag in a plane graph is a circuit of edges, such that any two, but no three, consecutive edges belong to the same face; a central circuit in ...
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ژورنال
عنوان ژورنال: ITM Web of Conferences
سال: 2019
ISSN: 2271-2097
DOI: 10.1051/itmconf/20192501012