From: ·····@uicsg.UUCP
Subject: Circular Lists
Date: 
Message-ID: <2700001@uicsg>
I am interested in finding out how often circular list structures arise
in normal lisp operation, if at all, and if so, in what applications.
From: ······@uiucdcsp.cs.uiuc.edu
Subject: Re: Circular Lists
Date: 
Message-ID: <80300005@uiucdcsp>
Almost always.  One typically wants to have backpointers in complex
datastructures, yielding a circularity right there.