A system M of equivalence relations on a set E is semirigid if only the projections and constant functions preserve all members of M. We construct semirigid ...
We construct semirigid systems of three equivalence relations. Our construction leads to the examples given by Zádori in 1983 and to many others and also ...
As an application of the composition we give three families of systems of five equivalence relations that are semirigid on the set A with |A|=4i, |A|=3i+1, or | ...
A system $M$ of equivalence relations on a set $E$ is semi rigid if only the projections and constant functions preserve all members of $M$.
To a system R of equivalence relations we associate a graph Gr. We observe that ifR is semirigid then the graph Gr is 2-connected. We show that the converse ...
this paper we explore properties of semirigid systems of equivalence relations. We show that if the system is semirigid then every edge of the graph is doubly ...
Oct 22, 2024 · We also present a notion of compositions of two semirigid systems which preserve semirigidity. As an application of the composition we give ...
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Abstract. A system M of equivalence relations on a set E is semirigid if only the identity and constant functions preserve all members of M. We.
We construct semirigid systems of three equivalence relations. Our construction leads to the examples given by Z\textbackslash'adori in 1983 and to many others ...
We also present a notion of compositions of two semirigid systems which preserve semirigidity.As an application of the composition we give three families of ...