Semidefinite Programming and Ramsey Numbers
نویسندگان
چکیده
Finding exact Ramsey numbers is a problem typically restricted to relatively small graphs. The flag algebra method was developed find asymptotic results for very large graphs, so it seems that the not suitable finding numbers. But this intuition wrong, and we will develop technique do just in paper. We new upper bounds many graph hypergraph As result, prove values $R(K_4^-,K_4^-,K_4^-)=28$, $R(K_8,C_5)= 29$, $R(K_9,C_6)= 41$, $R(Q_3,Q_3)=13$, $R(K_{3,5},K_{1,6})=17$, $R(C_3, C_5, C_5)= 17$, $R(K_4^-,K_5^-;3)= 12$. hope be adapted address other questions smaller graphs with method.
منابع مشابه
Semidefinite Programming and Ramsey Numbers
We use the theory of flag algebras to find new upper bounds for several small graph and hypergraph Ramsey numbers. In particular, we prove the exact values R(K− 4 ,K − 4 ,K − 4 ) = 28, R(K8, C5) = 29, R(K9, C6) = 41, R(Q3, Q3) = 13, R(K3,5,K1,6) = 17, R(C3, C5, C5) = 17, and R(K− 4 ,K − 5 ; 3) = 12, and in addition improve many additional upper bounds.
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ژورنال
عنوان ژورنال: SIAM Journal on Discrete Mathematics
سال: 2021
ISSN: ['1095-7146', '0895-4801']
DOI: https://doi.org/10.1137/18m1169473