Turan Devleti

On Turan hypergraphs

✍ M. Lorea 📂 Article 📅 1978 🏛 Elsevier Science 🌐 English ⚖ 466 KB

Let a(H) be the -,t\*rbility number of a hypergraph H = (X, a). T(n, L, ar) is the smallest 4 such that there exists :'. k-uniform hypergraph H with n vertices, 4 edges and with a(H) s Q. A k-uniform hypergraph H, with n vertices, T( n, k, cr ) edges and Q!(H) s ~1 is a Turan hypergraph. The value

Precise values of turan numbers

✍ A. F. Sidorenko 📂 Article 📅 1987 🏛 SP MAIK Nauka/Interperiodica 🌐 English ⚖ 276 KB

Turán measures

✍ S. Khrushchev 📂 Article 📅 2003 🏛 Elsevier Science 🌐 English ⚖ 156 KB

A probability measure s on the unit circle T is called a Tura´n measure if any point of the open unit disc D is a limit point of zeros of the orthogonal polynomials associated to s: We show that many classes of measures, including Szego¨measures, measures with absolutely convergent series of their p

Another extremal problem for Turan graph

Another extremal problem for Turan graphs

✍ Bruce Hedman 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 207 KB

We consider only finite, undirected graphs without loops or multiple edges. A clique of a graph G is a maximal complete subgraph of G. The clique number w(G) is the number of vertices in the largest clique of G. This note addresses the foflowing question: Which graphs G on n vertices with w(G) = r h

Remembering Paul Turán

✍ Richard Askey 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 129 KB

yet his mathematics is still as fresh as when he did it. Primarily this is because Tura n frequently looked at problems from a new point of view. I have heard this expressed by those who knew his work in areas I know well as well as in areas I do not understand at all. This often means that it will

Turán-Ramsey problems

✍ Béla Bollobás 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 278 KB

For i = 1,2 .... ,k, let Gi be a graph with vertex set [n] = {1 .... ,n} containing no Fi as a subgraph. At most how many edges are in G1 t3 -• • U Gk? We shall answer this Turfin-Ramseytype question asymptotically, and pose a number of related problems. Given graphs F1 ..... Fk, write exk(n,F 1 ..