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<DIV><STRONG><FONT face=Arial size=2>How is it possible to get GiNaC to yield
all the </FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>atoms occuring in an expression? (i.e.
return a</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>list of </FONT></STRONG><STRONG><FONT
face=Arial size=2>all the leaves of the expression tree).</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial size=2>This is of interest in the generation of
sparse </FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>jacobian / hessian matrices as one example
of </FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>applications.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial size=2>Vassilis</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG><BR><STRONG><FONT
face=Arial
size=2>-----------------------------------------------------------------<BR>Dr.
Vassilis S. Vassiliadis,<BR>Lecturer,</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial size=2>UNIVERSITY OF CAMBRIDGE,<BR>DEPARTMENT OF
CHEMICAL ENGINEERING</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial size=2>Pembroke Street, <BR>Cambridge CB2 3RA,
UK.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial size=2>e-mail: </FONT></STRONG><A
href="mailto:vsv20@cheng.cam.ac.uk"><STRONG><FONT face=Arial
size=2>vsv20@cheng.cam.ac.uk</FONT></STRONG></A></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial
size=2>-----------------------------------------------------------------</FONT></STRONG></DIV>
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