Finality regained: A coalgebraic study of Scott-sets and multisets

نویسندگان

  • Giovanna D'Agostino
  • Albert Visser
چکیده

In this paper we study iterated circular multisets in a coalgebraic framework. We will produce two essentially di erent universes of such sets. The unisets of the rst universe will be shown to be precisely the sets of the Scott universe. The unisets of the second universe will be precisely the sets of the AFA-universe. We will have a closer look into the connection of the iterated circular multisets and arbitrary trees.

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عنوان ژورنال:
  • Arch. Math. Log.

دوره 41  شماره 

صفحات  -

تاریخ انتشار 2002