The Chromatic Spectrum of a Ramsey Mixed Hypergraph
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519.179.1:004 (1)
Analiză combinatorică. Teoria grafurilor (91)
Știința și tehnologia calculatoarelor. Calculatoare. Procesarea datelor (2388)
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SLUTZKY, David; VOLOSHIN, Vitaly. The Chromatic Spectrum of a Ramsey Mixed Hypergraph. In: Computer Science Journal of Moldova. 2016, nr. 2(71), pp. 213-233. ISSN 1561-4042.
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Computer Science Journal of Moldova
Numărul 2(71) / 2016 / ISSN 1561-4042

The Chromatic Spectrum of a Ramsey Mixed Hypergraph

CZU: 519.179.1:004
Pag. 213-233

Slutzky David1, Voloshin Vitaly2
1 University of North Georgia,
2 Troy University
INTAS 2004-78-7193 Imaging GaAs X-ray Detectors
Disponibil în IBN: 1 septembrie 2016


We extend known structural theorems, primarily a result of Axenovich and Iverson, for the strict edge colorings of the complete graph Kn which avoid monochromatic and rainbow triangles to discover recursive relationships between the chromatic spectra of the bihypergraphs modeling this coloring problem. In so doing, we begin a systematic study of coloring properties of mixed hypergraphs derived from coloring the edges of a complete graph Kn in such a way that there are no rainbow copies of Kr and no monochromatic copies of Km, where n > r > 3, n > m > 3. We present the chromatic spectra of the bihypergraph models of Kn for 4 6 n 6 12 and r = m = 3. This study fits in the larger context of investigating mixed hypergraph structures that realize given spectral values, as well as investigations of the sufficiency of the spectral coefficients in obtaining recursive relationships without the need to subdivide them further into terms that count finer distinctions in the feasible partitions of the hypergraph. The bihypergraphs arising in this simplest case where r = m = 3 have spectra that are gap free and which do allow a recursive relationship, albeit a complicated one. The continuation of this project in future work will examine if both of these facts remain true for derived Ramsey Mixed Hypergraphs corresponding to larger r and m.

Ramsey number, antiramsey number, mixed hypergraph coloring, feasible partition, chromatic spectrum.