<html><div style='background-color:'><P>Dear TUG,</P>
<P> Trying to get to grips with Latex and I am using 'OzTex 3.1' , on a old macintosh ( a performa). </P>
<P>I am writing The Latex programme after opening ' Alpha 7.1 f '. and the Typesetting using OzTex.</P>
<P>According to my Latex Manual it should be possible, after creating</P>
<P>a DVI file, to create a pdf file. the programme is;</P>
<P> </P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT size=2><FONT face="Courier New">\documentclass{article}<o:p></o:p></FONT></FONT></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT size=2><FONT face="Courier New">\begin{document}<o:p></o:p></FONT></FONT></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT size=2><FONT face="Courier New">\title{Time Dependent Quadratic Hamiltonians, SU(1,1), SU(2),<o:p></o:p></FONT></FONT></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT size=2><FONT face="Courier New">SU(2,1) and SU(3)}<o:p></o:p></FONT></FONT></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT size=2><FONT face="Courier New">\section{Introduction}<o:p></o:p></FONT></FONT></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT size=2><FONT face="Courier New">the Paul trap \cite{pau}, ultra-short laser <o:p></o:p></FONT></FONT></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT size=2><FONT face="Courier New">\begin{thebibliography}{abc}<o:p></o:p></FONT></FONT></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT size=2><FONT face="Courier New">\bibitem{pau}W.Paul, Rev.Mod.Phys.{\bf 62}(1990) 531 <o:p></o:p></FONT></FONT></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><FONT face="Courier New"><FONT size=2>\end{thebibliography</FONT><SPAN style="FONT-SIZE: 14pt">}<o:p></o:p></SPAN></FONT></P>
<P class=MsoPlainText style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt"><FONT face="Courier New">\end{document}<o:p></o:p></FONT></SPAN></P>
<P><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN style="mso-tab-count: 1"> </SPAN></SPAN></P>
<P>But I receive the following message:</P>
<P>LaTex warning; Citation 'pau' is undefined.</P>
<P>Any ideas about what I am doing which is wrong.</P>
<P>Many Thanks</P>
<P>Paul</P>
<DIV>vit</DIV></div></html>