@misc{cogprints466,
volume = {85},
number = {1},
month = {July},
author = {Mujdat Pakkan and Varol Akman},
title = {HYPERSOLVER: A Graphical Tool for Commonsense Set Theory},
journal = {Information Sciences: An International Journal},
pages = {43--61},
year = {1995},
keywords = {ZF (Zermelo-Fraenkel) set theory, nonwellfounded sets (hypersets), AFA (anti-foundation axiom), the Solution Lemma, situation theory, HYPERSOLVER, Conway paradox.},
url = {http://cogprints.org/466/},
abstract = {This paper investigates an alternative set theory (due to Peter Aczel) called Hyperset Theory. Aczel uses a graphical representation for sets and thereby allows the representation of non-well-founded sets. A program, called HYPERSOLVER, which can solve systems of equations defined in terms of sets in the universe of this new theory is presented. This may be a useful tool for commonsense reasoning.}
}