Generalized Turán results for intersecting cliques

preprint2022arXivOpen access

Abstract

For fixed graphs FF and HH, the generalized Turán problem asks for the maximum number ex(n,H,F)ex(n,H,F) of copies of HH that an nn-vertex FF-free graph can have. In this paper, we focus on cases with FF being Br,sB_{r,s}, the graph consisting of two cliques of size ss sharing rr common vertices. We determine ex(n,Kt,Br,0)ex(n,K_t,B_{r,0}), ex(n,Kt,Br,1)ex(n,K_t,B_{r,1}) and ex(n,Ka,b,B3,1)ex(n,K_{a,b},B_{3,1}) for all values of a,b,r,ta,b,r,t if nn is large enough.

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