Zobrazeno 1 - 9 of 9 pro vyhledávání: '"Jr. Earl Glen Whitehead"'
1
Difference sets and sum-free sets in groups of order 16
Autor: Jr. Earl Glen Whitehead
Publikováno v: Discrete Mathematics. 13(4):399-407
Transversals for sum-free sets in the nine nonabelian order 16 groups are given. It is shown that exactly eight of the order 16 groups have difference sets [email protected] = 2and D = -D. It is proven that the only (@u, k, @l) difference sets with @
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fec0102af9d48ee2301e1f84f16a0d29
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2
The ramsey number N(3, 3, 3, 3; 2)
Autor: Jr. Earl Glen Whitehead
Publikováno v: Discrete Mathematics. 4:389-396
A partition of the nonzero elements of the finite abelian group Z7Z × Z7Z into four sum-free sets shows that N(3,3,3,3;2) > 49. Based on a matrix technique for analyzing the structure of the two nonisomorphic 16-vertex edge-colorings nondegenerate w
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9835f72c9e92200d3ef28f15ba5ec0b
https://doi.org/10.1016/0012-365x(73)90174-x
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3
Chromatic polynomials of generalized trees
Autor: Jr. Earl Glen Whitehead
Publikováno v: Discrete Mathematics. 72:391-393
This paper is a survey of results on chromatic polynomials of graphs which are generalizations of trees. In particular, chromatic polynomials of q -trees will be discussed. The smallest q -tree ( q ≥1) is the complete graph K q on q vertices. A q -
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b3f5b30bc1e7ab15701130b5db982ab
https://doi.org/10.1016/0012-365x(88)90231-2
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