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math.CO2020
Preservation of discrete structures. A metric point of view
C. Delhommé, M. Miyakawa, M. Pouzet +1
In the early 80's, Alain Quilliot presented an approach of ordered sets and graphs in terms of metric spaces, where instead of positive real numbers, the values of the distance are…
math.CO2015★ 2 cited
Semirigid systems of three equivalence relations
Christian Delhommé, Masahiro Miyakawa, Maurice Pouzet +2
A system of equivalence relations on a set is \emph{semirigid} if only the identity and constant functions preserve all members of . We construct semir…