Deprecated: $wgMWOAuthSharedUserIDs=false is deprecated, set $wgMWOAuthSharedUserIDs=true, $wgMWOAuthSharedUserSource='local' instead [Called from MediaWiki\HookContainer\HookContainer::run in /var/www/html/w/includes/HookContainer/HookContainer.php at line 135] in /var/www/html/w/includes/Debug/MWDebug.php on line 372
On the Ramsey numbers r(G,nH) and r(nG,nH) when n is large - MaRDI portal

On the Ramsey numbers r(G,nH) and r(nG,nH) when n is large (Q1090340)

From MaRDI portal





scientific article; zbMATH DE number 4006299
Language Label Description Also known as
English
On the Ramsey numbers r(G,nH) and r(nG,nH) when n is large
scientific article; zbMATH DE number 4006299

    Statements

    On the Ramsey numbers r(G,nH) and r(nG,nH) when n is large (English)
    0 references
    1987
    0 references
    Let G and H be graphs. The Ramsey number \(r(G,H)\) is the smallest number p so that, if the edges of the complete graph on p vertices are colored with orange and blue, then either there is a subgraph isomorphic to G with all of its edges colored orange or a subgraph isomorphic to H with all of its edges colored blue. This paper is concerned with graphs of the form nG, i.e. the graph consisting of n disjoint copies of G. Several results are proved including: Theorem 5.3: If k and h are fixed and n is sufficiently large, then: \[ r(nK_ k,nK_ h)=(k+h-1)n+r(K_{k- 1},K_{h-1})-2. \]
    0 references
    Ramsey number
    0 references
    disjoint copies
    0 references
    0 references

    Identifiers