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author:

Chen, Xun (Chen, Xun.) [1] | Lin, Qizhong (Lin, Qizhong.) [2] (Scholars:林启忠)

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Scopus SCIE

Abstract:

A book B-n is a graph which consists of n triangles sharing a common edge. Rousseau and Sheehan (1978) conjectured that r(B-m, B-n) <= 2(m+ n+ 1)+ c some constant c > 0. Let m = left Perpendicular alpha n right Perpendicular where 0 < alpha = 1 is a real number. A result of Nikiforov and Rousseau [Random Structures Algorithms 27 (2005), 379-400] implies that this conjecture holds in a stronger form for 0 < alpha <= 1/6 and large n. We prove that r(B-m, B-n) <= (3/2 + 3 alpha + o(1))n, where 1/4 < alpha < 1/2. This confirms the conjecture in a stronger form for 1/6 <= alpha < 1/2 and large n. As a corollary, r(B (inverted left Perpendicular n4 inverted right Perpendicular), B-n) = (9/4 + o(1))n. (c) 2023 Elsevier Ltd. All rights reserved.

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Community:

  • [ 1 ] [Chen, Xun]Lishui Univ, Dept Math, Lishui 323000, Peoples R China
  • [ 2 ] [Lin, Qizhong]Fuzhou Univ, Ctr Discrete Math, Fuzhou 350108, Peoples R China

Reprint 's Address:

  • [Chen, Xun]Lishui Univ, Dept Math, Lishui 323000, Peoples R China;;

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Source :

EUROPEAN JOURNAL OF COMBINATORICS

ISSN: 0195-6698

Year: 2024

Volume: 115

1 . 0 0 0

JCR@2023

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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