Results 11 to 20 of about 1,024 (103)

Generalized ramsey theory for graphs, x: double stars

open access: yesDiscrete Mathematics, 1979
AbstractThe double star S(n, m), where n ⩾ m ⩾ 0, is the graph consisting of the union of two stars K1,n and K1,m together with a line joining their centers. Its ramsey number r(S(n, m)) is the least number p such that there is a monochromatic copy of S(n, m) in any 2-coloring of the edges of Kp.
Grossman, Jerrold W.   +2 more
openaire   +4 more sources

What can we hope to accomplish in generalized Ramsey theory?

open access: yesDiscrete Mathematics, 1987
Let F, G, and H denote graphs. We write \(F\to (G,H)\) to mean that, however the edges of F are colored red and blue, either the red subgraph of F contains a copy of G or the blue subgraph of F contains a copy of H. We write \(r(G,H)=t\) if \(K_ t\to (G,H)\) but \(K_{t-1}\nrightarrow (G,H)\); r(G,H) is called the Ramsey number of G and H. In this paper,
openaire   +4 more sources

Generalization of Ramsey Number for Cycle with Pendant Edges

open access: yesMathematics
This paper explores various Ramsey numbers associated with cycles with pendant edges, including the classical Ramsey number, the star-critical Ramsey number, the Gallai–Ramsey number, and the star-critical Gallai–Ramsey number.
Jagjeet Jakhar   +5 more
doaj   +1 more source

Rainbow generalizations of Ramsey theory - a dynamic survey

open access: yesTheory and Applications of Graphs, 2014
In this work, we collect Ramsey-type results concerning rainbow edge colorings of graphs.
Fujita, Shinya   +3 more
openaire   +4 more sources

Generalized Ramsey theory and decomposable properties of graphs

open access: yesDiscussiones Mathematicae Graph Theory, 1999
Summary: We translate Ramsey-type problems into the language of decomposable hereditary properties of graphs. We prove a distributive law for reducible and decomposable properties of graphs. Using it we establish some values of graph theoretical invariants of decomposable properties and show their correspondence to generalized Ramsey numbers.
Burr, Stefan A.   +3 more
openaire   +1 more source

Monochromatic Sums and Products of Polynomials

open access: yesDiscrete Analysis
Monochromatic sums and products of polynomials, Discrete Analysis 2024:5, 7 pp. An early result in Ramsey theory, Schur's theorem, states that if the positive integers are finitely coloured, then there will always be $x$ and $y$ such that $x,y$ and $x ...
Ryan Alweiss
doaj   +1 more source

On a generalization of Ramsey theory

open access: yesDiscrete Mathematics, 1982
AbstractIn [2, 3], Chung and Liu introduce the following generalization of Ramsey Theory for graphs.
openaire   +2 more sources

Ramsey Theory Problems over the Integers: Avoiding Generalized Progressions [PDF]

open access: yes, 2017
Two well studied Ramsey-theoretic problems consider subsets of the natural numbers which either contain no three elements in arithmetic progression, or in geometric progression. We study generalizations of this problem, by varying the kinds of progressions to be avoided and the metrics used to evaluate the density of the resulting subsets. One can view
Best, Andrew   +6 more
openaire   +2 more sources

On the use of senders in generalized ramsey theory for graphs

open access: yesDiscrete Mathematics, 1985
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Burr, Stefan A   +2 more
openaire   +1 more source

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