<html> <head> <style></style> </head> <body class='hmmessage'><div dir='ltr'> Dear list members,<br><br>Firstly thank you, for clarifying uninterned symbols.<br><br>I've tried running the examples for reading graph structure in the reference manual 12.6.16 in DrRacket.<br><br>When I put (#1=100 #1# #1#) in either the definitions or interactions window  I get <br><br>. read: #..= expressions not allowed in read-syntax mode<br><br>I've tried '(#1=100 #1# #1#) and it gives me the same error.<br><br>Same error with the second example:  <span class="RktInBG"><span class="RktIn">#0=(1 . #0#)<br><br>Also I'm not clear how </span></span><span class="RktInBG"><span class="RktIn">#0=(1 . #0#)  converts to <br></span></span><span class="RktPn">(</span><span class="RktSym">let</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktPn">[</span><span class="RktSym">v</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">cons</span><span class="hspace"> </span><span class="RktVal">1</span><span class="hspace"> </span><span class="RktVal">#f</span><span class="RktPn">)</span><span class="RktPn">]</span><span class="RktPn">)</span><span class="hspace">  </span><span class="RktPn"><br>     (</span><span class="RktSym">set-cdr!</span><span class="hspace"> </span><span class="RktSym">v</span><span class="hspace"> </span><span class="RktSym">v</span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktSym">v</span><span class="RktPn">)</span><br><br>Thanks,<br>Harry Spier<br> </div></body> </html>