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A graph G is said to be claw-free if G does not contain K1,3 as an induced subgraph. For an integer s >= 0, G is s-Hamiltonian if for any vertex subset S subset of V(G) with |S | <= s, G - S is Hamiltonian. Lai et al. in [On s-Hamiltonian line graphs of claw-free graphs, Discrete Math., 342 (2019)] proved that for a connected claw-free graph G and any integer s >= 2, its line graph L(G) is s-Hamiltonian if and only if L(G) is (s + 2)-connected.Motivated by above result, we in this paper propose the following conjecture. Let G be a claw-free connected graph such that L(G) is 3-connected and let s >= 1 be an integer. If one of the following holds:(i) s is an element of {1, 2, 3, 4} and L(G) is essentially (s + 3)-connected, (ii) s >= 5 and L(G) is essentially (s + 2)-connected, jskthen for any subset S subset of V(L(G)) with |S | <= s, |D <= 1(L(G) - S )| <= and L(G) - S - D <= 1(L(G) - S ) 2 is Hamiltonian. Here, D <= 1(L(G) - S ) denotes the set of vertices of degree at most 1 in L(G) - S. Furthermore, we in this paper deal with the cases s is an element of {1, 2, 3, 4} and L(G) is essentially (s+3)-connected about this conjecture.
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AIMS MATHEMATICS
ISSN: 2473-6988
Year: 2022
Issue: 10
Volume: 7
Page: 19553-19561
2 . 2
JCR@2022
1 . 8 0 0
JCR@2023
ESI Discipline: MATHEMATICS;
ESI HC Threshold:24
JCR Journal Grade:1
CAS Journal Grade:3
Cited Count:
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
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