<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">The set of commands below, when run on its own (in a test file using the correct packages and article style, TeX and Ghostscript in TeXShop), runs fine; when inserted in a (much) larger file (also with all the right packages), following a theorem (lemma) environment and preceding a proof environment, it returns a set of warnings as follows:<DIV>**************************************************<DIV>! Missing number, treated as zero.</DIV><DIV><to be read again> </DIV><DIV> P</DIV><DIV>l.380 <SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>}</DIV><DIV> </DIV><DIV>? </DIV><DIV>! Illegal unit of measure (pt inserted).</DIV><DIV><to be read again> </DIV><DIV> P</DIV><DIV>l.380 <SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>}</DIV><DIV> </DIV><DIV>? </DIV><DIV>! Missing number, treated as zero.</DIV><DIV><to be read again> </DIV><DIV> \relax </DIV><DIV>l.380 <SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>}</DIV><DIV> </DIV><DIV>? </DIV><DIV>! Illegal unit of measure (pt inserted).</DIV><DIV><to be read again> </DIV><DIV> \relax </DIV><DIV>l.380 <SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>}</DIV><DIV> </DIV><DIV>? </DIV><DIV>*****************************************************</DIV><DIV>but then runs fine. What is going on?</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Here is the set of commands in question:</DIV><DIV>*******************************************************</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\begin{figure}[htbp]</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\begin{center}</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\begin{pspicture}(-0.5,-2.5)(5.5,2.5)</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psset{xunit=0.25 cm, yunit=1.5 cm}</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\uput[ur](0.75,0.5){$y=\fof{x}$}</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\uput[dr](0.75,-0.5){\textcolor{darkgray}{$y=-\fof{x}$}}</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psline{<->}(-1,0)(22,0)</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psline{<->}(0,-1.2)(0,1.2)</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\pscustom%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>{</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\gsave</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psline[linestyle=none](PI 2 div 0)(0,0)(0,1)</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psplot[linestyle=none]{0}{PI 2 div}{x COS x 1 add div}%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\fill[fillstyle=solid, fillcolor=lightgray]</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\grestore</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>}</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN></DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\pscustom[fillstyle=solid, fillcolor=lightgray]%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>{</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psplot[linestyle=none]{PI 3 mul 2 div}{PI 2 div}{x COS x 1 add div}%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>}</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\pscustom[fillstyle=solid, fillcolor=lightgray]%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>{</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psplot[linestyle=none]{PI 3 mul 2 div}{PI 5 mul 2 div}{x COS x 1 add div}%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>}</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\pscustom[fillstyle=solid, fillcolor=lightgray]%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>{</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psplot[linestyle=none]{PI 5 mul 2 div}{PI 7 mul 2 div}{x COS x 1 add div}%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>}</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\pscustom[fillstyle=solid, fillcolor=lightgray]%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>{</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psplot[linestyle=none]{PI 7 mul 2 div}{PI 9 mul 2 div}{x COS x 1 add div}%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>}</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\pscustom[fillstyle=solid, fillcolor=lightgray]%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>{</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psplot[linestyle=none]{PI 9 mul 2 div}{PI 11 mul 2 div}{x COS x 1 add div}%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>}</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\pscustom[fillstyle=solid, fillcolor=lightgray]%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>{</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psplot[linestyle=none]{PI 11 mul 2 div}{PI 13 mul 2 div}{x COS x 1 add div}%</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>}</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psplot[linewidth=1.2 pt]{0}{22}{x COS x 1 add div}</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\psplot[linecolor=darkgray]{0}{22}{x COS x 1 add div -1 mul}</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\end{pspicture}</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\caption{\protect\refer{lem}{absconvint} (Absolute Convergence for Integrals)}</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\label{fig:absconvint}</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\end{center}</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>\end{figure}</DIV><DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN></DIV><DIV>************************************************************************************************<BR><DIV> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><P style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px"><BR></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">Zbigniew Nitecki</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">Department of Mathematics</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">Tufts University</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">Medford, MA 02155</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px"><BR></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">telephones:</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">Office<SPAN class="Apple-converted-space"><SPAN class="Apple-converted-tab"> <SPAN class="Apple-converted-space"> </SPAN></SPAN></SPAN>(617)627-3843</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">Dept.<SPAN class="Apple-converted-space"><SPAN class="Apple-converted-tab"> <SPAN class="Apple-converted-space"> </SPAN></SPAN></SPAN>(617)627-3234</FONT></P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">Dept. fax<SPAN class="Apple-converted-space"><SPAN class="Apple-converted-tab"> <SPAN class="Apple-converted-space"> </SPAN></SPAN></SPAN>(617)627-3966</FONT></P><BR class="Apple-interchange-newline"></SPAN></SPAN> </DIV><BR></DIV></DIV></BODY></HTML>