The complexity of surjective homomorphism problems--a survey

Manuel Bodirsky; Jan Kára; Barnaby Martin

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The complexity of surjective homomorphism problems--a survey

机译：射影同态问题的复杂性-一项调查

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摘要

We survey known results about the complexity of surjective homomorphism problems, studied in the context of related problems in the literature such as list homomorphism, retraction and compaction. In comparison with these problems, surjective homomorphism problems seem to be harder to classify and we examine especially three concrete problems that have arisen from the literature, two of whose complexity remains open.

机译：我们调查关于射影同态问题的复杂性的已知结果，该研究是在文献中的相关问题（如列表同态，收缩和压缩）的背景下进行的。与这些问题相比，射影同构问题似乎更难分类，我们特别研究了文献中出现的三个具体问题，其中两个仍然很复杂。

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《Discrete Applied Mathematics》 |2012年第12期|共11页
作者
Manuel Bodirsky; Jan Kára; Barnaby Martin;
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原文格式 PDF
正文语种 eng
中图分类离散数学;
关键词
Surjective homomorphisms; Computational complexity; Constraint satisfaction;

机译：形容同构;计算复杂度;约束满意度;

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The complexity of surjective homomorphism problems--a survey

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