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author:

Zeng, Qing Hou (Zeng, Qing Hou.) [1] (Scholars:曾庆厚) | Hou, Jian Feng (Hou, Jian Feng.) [2] (Scholars:侯建锋) | Deng, Jin (Deng, Jin.) [3] | Lei, Xia (Lei, Xia.) [4]

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Scopus SCIE CSCD

Abstract:

Let G = (V,E) be a graph with m edges. For reals p is an element of [0, 1] and q = 1 - p, let m(p)(G) be the minimum of qe(V-1) + pe(V-2) over partitions V = V (1) boolean OR V-2, where e(V-i) denotes the number of edges spanned by V-i. We show that if m(p)(G) = pqm - delta, then there exists a bipartition V-1, V-2 of G such that e(V-1) <= p(2) m - delta + p root m/2 + o(root m) and e(V-2) <= q(2) m - delta + q root m/2 + o(root m) for delta = o (m(2/3)). This is sharp for complete graphs up to the error term o(root m). For an integer k >= 2, let f(k)(G) denote the maximum number of edges in a k-partite subgraph of G. We prove that if f(k)(G) = (1 - 1/k) m + alpha, then G admits a k-partition such that each vertex class spans at most m/k(2) - ohm(m/k(7.5)) edges for alpha = ohm(m/k(6)). Both of the above improve the results of Bollob ' as and Scott.

Keyword:

biased partition Graph judicious partition Max-Cut

Community:

  • [ 1 ] [Zeng, Qing Hou]Fuzhou Univ, Ctr Discrete Math, Fuzhou 350003, Peoples R China
  • [ 2 ] [Hou, Jian Feng]Fuzhou Univ, Ctr Discrete Math, Fuzhou 350003, Peoples R China
  • [ 3 ] [Deng, Jin]Hunan Coll Informat, Changsha 410200, Hunan, Peoples R China
  • [ 4 ] [Lei, Xia]Xiamen Univ Technol, Sch Software Engn, Xiamen 361024, Peoples R China

Reprint 's Address:

  • [Lei, Xia]Xiamen Univ Technol, Sch Software Engn, Xiamen 361024, Peoples R China

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Source :

ACTA MATHEMATICA SINICA-ENGLISH SERIES

ISSN: 1439-8516

CN: 11-2039/O1

Year: 2017

Issue: 5

Volume: 33

Page: 668-680

0 . 5 2 7

JCR@2017

0 . 8 0 0

JCR@2023

ESI Discipline: MATHEMATICS;

ESI HC Threshold:71

JCR Journal Grade:3

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count: 1

SCOPUS Cited Count: 1

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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