Zobrazeno 1 - 4
of 4
pro vyhledávání: '"LÜDa-mei(吕大梅)"'
Publikováno v:
Zhejiang Daxue xuebao. Lixue ban, Vol 40, Iss 4, Pp 382-386 (2013)
图G的（d, 1)-全标号是从V(G)∪E(G)到非负整数的函数，且满足：(i) G中任意2个相邻顶点的标号不同；(ii) G中任意2个相邻边的标号不同；（iii）顶点与其关联边的标号差至少为d.(d，1)-全标号的
Externí odkaz:
https://doaj.org/article/54d859c175004c1db1d7c5b6dd85b2a6
Autor:
YANDong-mei(严冬梅), LÜDa-mei(吕大梅)
Publikováno v:
Zhejiang Daxue xuebao. Lixue ban, Vol 40, Iss 3, Pp 249-254 (2013)
Hopf bifurcation is an important part of bifurcation theory of dynamical systems. Almost all known works are concerned with the bifurcation and number of limit cycles near a nondegenerate focus or center. In this paper, we study a polynomial near-Ham
Externí odkaz:
https://doaj.org/article/3bc406fec21b4b5696b753a382f8e4d0
Autor:
LüDa-mei(吕大梅), LüJia-jun(吕嘉钧)
Publikováno v:
Zhejiang Daxue xuebao. Lixue ban, Vol 33, Iss 4, Pp 368-371 (2006)
对任一个n阶单图G，用a(G)表示G的代数连通度，证明了对任一n阶单圈图G，有1 ≤ a(G)+a(Gc).
Externí odkaz:
https://doaj.org/article/61278b8470d94feab93d40d1a17aa32b
Publikováno v:
Zhejiang Daxue xuebao. Lixue ban, Vol 36, Iss 6, Pp 616-619 (2009)
Let G be a simple graph with n vertices and Gc be its complement graph. Let a(G) be the algebraic connectivity of G. The bound for the spectrum of the Nordhaus- Gaddum type has been studied in many papers while this paper, the bound for the algebraic
Externí odkaz:
https://doaj.org/article/2a93d259d26644d6992efaf13d745870