Fundamental study: Dcpo-completion of posets

  • Authors:
  • Dongsheng Zhao;Taihe Fan

  • Affiliations:
  • Mathematics and Mathematics Education, National Institute of Education, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, Singapore;Department of Mathematics, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, 310018, China

  • Venue:
  • Theoretical Computer Science
  • Year:
  • 2010

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Abstract

We introduce a new type of dcpo-completion of posets, called D-completion. For any poset P, the D-completion exists, and P and its D-completion have the isomorphic Scott closed set lattices. This completion is idempotent. A poset P is continuous (algebraic) if and only if its D-completion is continuous(algebraic). Using the D-completion, we construct the local dcpo-completion of posets, that revises the one given by Mislove. In the last section, we define and study bounded sober spaces.