On Tinhofer's Linear Programming Approach to Isomorphism Testing
On Tinhofer's Linear Programming Approach to Isomorphism Testing
复制标题
关于 Tinhofer 的同构测试线性规划方法
DOI:
10.1007/978-3-662-48054-0_3
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
O. Verbitsky
中科院分区:
文献类型:
--
作者:
V. Arvind;J. Köbler;G. Rattan;O. Verbitsky
Exploring a linear programming approach to Graph Isomorphism, Tinhofer (1991) defined the notion ofcompact graphs: A graph iscompactif the polytope of its fractional automorphisms is integral. Tinhofer noted that isomorphism testing for compact graphs can be done quite efficiently by linear programming. However, the problem of characterizing and recognizing compact graphs in polynomial time remains an open question. In this paper we make new progress in our understanding of compact graphs. Our results are summarized below:We show that all graphsGwhich are distinguishable from any non-isomorphic graph by the classical color-refinement procedure are compact. In other words, the applicability range for Tinhofer’s linear programming approach to isomorphism testing is at least as large as for the combinatorial approach based on color refinement.Exploring the relationship between color refinement and compactness further, we study related combinatorial and algebraic graph properties introduced by Tinhofer and Godsil. We show that the corresponding classes of graphs form a hierarchy and we prove that recognizing each of these graph classes isP-hard. In particular, this gives a first complexity lower bound for recognizing compact graphs.
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影响因子:
1.1
作者:
H. Schreck;G. Tinhofer
通讯作者:
G. Tinhofer
DOI:
10.1007/s10114-004-0485-1
发表时间:
2005
期刊:
Acta Mathematica Sinica
影响因子:
--
作者:
Ping Wang;Jiongsheng Li
通讯作者:
Jiongsheng Li
DOI:
--
发表时间:
1990
期刊:
影响因子:
--
作者:
N. Immerman;E. Lander
通讯作者:
E. Lander
影响因子:
1.4
作者:
V. Arvind;J. Köbler;G. Rattan;O. Verbitsky
通讯作者:
O. Verbitsky
影响因子:
1.1
作者:
Martin Grohe
通讯作者:
Martin Grohe