当前位置: X-MOL 学术Discret. Math. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
On the complexity of all (g,f)-factors problem
Discrete Mathematics ( IF 0.8 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.disc.2020.112193
Hongliang Lu , Wei Wang , Yaolin Jiang

Abstract Let G be a graph with vertex set V and let g , f : V → Z + be two functions such that g ≤ f . We say that G has all ( g , f ) -factors if G has an h -factor for every h : V → Z + such that g ( v ) ≤ h ( v ) ≤ f ( v ) for every v ∈ V and ∑ v ∈ V h ( v ) ≡ 0 ( mod 2 ) . Two decades ago, Niessen derived from Tutte’s f -factor theorem a similar characterization for the property of graphs having all ( g , f ) -factors and asked whether there is a polynomial time algorithm for testing whether a graph G has all ( g , f ) -factors. (A characterization of graphs having all ( g , f ) -Factors, (Niessen, 1998).) In this paper, we show that it is NP-hard to determine whether a graph G has all ( g , f ) -factors, which gives a negative answer to the question of Niessen.

中文翻译:

关于所有(g,f)-因子问题的复杂性

摘要 令 G 是一个顶点集为 V 的图,并令 g , f : V → Z + 是两个函数,使得 g ≤ f 。我们说 G 具有所有 ( g , f ) -因子,如果 G 对每个 h 都有一个 h -因子: V → Z + 使得 g ( v ) ≤ h ( v ) ≤ f ( v ) 对于每个 v ∈ V 并且∑ v ∈ V h ( v ) ≡ 0 ( mod 2 ) 。20 年前,Niessen 从 Tutte 的 f 因子定理推导出了具有所有 ( g , f ) - 因子的图的性质的类似表征,并询问是否存在多项式时间算法来测试图 G 是否具有所有 ( g , f ) -因素。(具有所有 ( g , f ) -因子的图的表征,(Niessen,1998)。)在本文中,我们表明确定图 G 是否具有所有 ( g , f ) -因子是 NP 难的,这对尼森的问题给出了否定的答案。
更新日期:2021-02-01
down
wechat
bug