## Paper: Non-well-founded sets obtained from ideal fixed points (at LICS 1989)

**Michael W. Mislove Lawrence S. Moss Frank J. Oles**

### Abstract

Motivated by ideas from the study of abstract data types, the authors show how to interpret non-well-founded sets as fixed
points of continuous transformations of an initial continuous algebra. They consider a preordered structure closely related
to the set HF of well-founded, hereditarily finite sets. By taking its ideal completion, the authors obtain an initial continuous
algebra in which they are able to solve all of the usual systems of equations that characterize hereditarily finite, non-well-founded
sets. In this way, they are able to obtain a structure which is isomorphic to HF_{1}, the non-well-founded analog to HF

### BibTeX

@InProceedings{MisloveMossOles-Nonwellfoundedsetso, author = {Michael W. Mislove and Lawrence S. Moss and Frank J. Oles}, title = {Non-well-founded sets obtained from ideal fixed points}, booktitle = {Proceedings of the Fourth Annual IEEE Symposium on Logic in Computer Science (LICS 1989)}, year = {1989}, month = {June}, pages = {263--272}, location = {Pacific Grove, CA, USA}, publisher = {IEEE Computer Society Press} }