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pro vyhledávání: '"Liu, Weijun"'
Let $\mathcal{D}$ be a non-trivial $G$-block-transitive $3$-$(v,k,1)$ design, where $T\leq G \leq \mathrm{Aut}(T)$ for some finite non-abelian simple group $T$. It is proved that if $T$ is a simple exceptional group of Lie type, then $T$ is either th
Externí odkaz:
http://arxiv.org/abs/2305.08052
Autor:
Liao, Qianfen, Liu, Weijun
In this paper, we give a characterization of unicyclic graphs with diameter at most 4 which are A-vertex magic. Moreover, let G be a bicyclic graph of diameter 3, then G is group vertex magic if and only if G = M11(0, 0).
Comment: 14 pages, 4 fi
Comment: 14 pages, 4 fi
Externí odkaz:
http://arxiv.org/abs/2303.04588
Let $\mathcal{D}$ be a nontrivial $3$-$(v,k,1)$ design admitting a block-transitive group $G$ of automorphisms. A recent work of Gan and the second author asserts that $G$ is either affine or almost simple. In this paper, it is proved that if $G$ is
Externí odkaz:
http://arxiv.org/abs/2208.00670
Publikováno v:
In Separation and Purification Technology 9 August 2024 341
Autor:
Zhang, Guangtai, Liu, Weijun, Bian, Hongyou, Wang, Huiru, Wang, Wei, Xu, Xiaowen, Liu, Jinsheng
Publikováno v:
In Materials Today Communications August 2024 40
Let $G$ be a graph of order $n$ and spectral radius be the largest eigenvalue of its adjacency matrix, denoted by $\mu(G)$. In this paper, we determine the unique graph with maximum spectral radius among all graphs of order $n$ without containing the
Externí odkaz:
http://arxiv.org/abs/2201.04889
Autor:
Gan, Yunsong, Liu, Weijun
Publikováno v:
Discrete Mathematics, Volume 346, Issue 10 (2023)
This paper studies the long-standing open problem of the reduction of Steiner 3-designs admitting a block-transitive automorphism group. We prove that if G acts as a point-primitive, block-transitive automorphism group of a nontrivial Steiner 3-desig
Externí odkaz:
http://arxiv.org/abs/2112.00466
Publikováno v:
Advances in Mathematics (China), 51 (2) (2022) 193-258
This survey is two-fold. We first report new progress on the spectral extremal results on the Tur\'{a}n type problems in graph theory. More precisely, we shall summarize the spectral Tur\'{a}n function in terms of the adjacency spectral radius and th
Externí odkaz:
http://arxiv.org/abs/2111.03309
Autor:
Liu, Weijun1,2,3 (AUTHOR) liuweijunpsy@163.com, Ding, Cody4 (AUTHOR) dingc@umsl.edu, Li, Ziang1,2,3 (AUTHOR) liziang20061122@163.com, Chen, Hong1,2,3 (AUTHOR) chenhswu@163.com
Publikováno v:
Brain Sciences (2076-3425). Jun2024, Vol. 14 Issue 6, p605. 11p.
Autor:
Zhang, Kai, Li, Binghan, Liu, Weijun, Liu, Weidong, Wang, Wenlong, Wang, Huiru, Bian, Hongyou
Publikováno v:
In Journal of Alloys and Compounds 15 December 2024 1008