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C-unique Dcpos and Non-maximality of the Class of Dominated Dcpos Regarding Γ-faithfulness
Author(s) -
Luoshan Xu,
Dongsheng Zhao
Publication year - 2019
Publication title -
electronic notes in theoretical computer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.242
H-Index - 60
ISSN - 1571-0661
DOI - 10.1016/j.entcs.2019.07.027
Subject(s) - mathematics , class (philosophy) , pure mathematics , set (abstract data type) , space (punctuation) , topological space , discrete mathematics , computer science , artificial intelligence , programming language , operating system
We continue the study of the dcpos which are determined by their Scott closed set lattices. Such dcpos are called C σ -unique. Some new sufficient conditions for a dcpo to be C σ -unique are given. One example is constructed to show that a C σ -unique dcpo need not be dominated. Thus the question whether the dominated dcpos form a maximal Γ-faithful class of dcpos is negatively answered. Using a recent result by Zhao and Xi, we also deduce that every T 1 topological space has a dcpo model that is C σ -unique.

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