Article ID Journal Published Year Pages File Type
419412 Discrete Applied Mathematics 2012 11 Pages PDF
Abstract

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.

Related Topics
Physical Sciences and Engineering Computer Science Computational Theory and Mathematics
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