<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:14pt"><div class="" style="">Dear folks,</div><div class="" style=""><br class="" style=""></div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal"><br class="" style=""></div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal">Please consider the following code.</div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal"><br class="" style=""></div><div
class="" style="">\documentclass[pstricks,border=12pt,12pt]{standalone}</div><div class="" style="">\usepackage{pst-plot,pst-text}</div><div class="" style="">\psset{unit=4cm}</div><div class="" style=""><br class="" style=""></div><div class="" style="">\def\f{sqrt(x)}</div><div class="" style="">\def\g{x}</div><div class="" style=""><br class="" style=""></div><div class="" style="">\begin{document}</div><div class="" style="">\multido{\r=-1.0+0.1}{18}{%</div><div class="" style="">\begin{pspicture}[algebraic,plotpoints=200](-1,-1)(2.25,2.25)</div><div class="" style=""><span class="" style="white-space:pre"> </span>\psaxes{->}(0,0)(-1,-1)(2,2)[$x$,0][$y$,90]%</div><div class="" style=""><span class="" style="white-space:pre"> </span>\pstextpath[r](0,.1){\psplot[linecolor=blue]{-.5}{1.5}{\g}}{\textcolor{blue}{$g(x)= x$}}%</div><div class="" style=""><span class="" style="white-space:pre">
</span>\pstextpath[c](\r,.1){\psplot[linecolor=red]{0}{1.5}{\f}}{\textcolor{red}{$f(x)=\sqrt x$}}%</div><div class="" style="">\end{pspicture}}</div><div class="" style="">\end{document}</div><div class="" style=""><br class="" style=""></div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal">There is a small red horizontal line as shown in this figure <a href="http://i.stack.imgur.com/mVTOu.gif" class="" style="">http://i.stack.imgur.com/mVTOu.gif</a>. Is it a bug?</div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal"><br class="" style=""></div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica
Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal"><br class="" style=""></div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal">Thank you in advance.</div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal"><br class="" style=""></div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal"><br class="" style=""></div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande',
sans-serif; background-color: transparent; font-style: normal">best regards,</div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal"><br class="" style=""></div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal"><br class="" style=""></div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal">I am who I say I am</div><div class="" style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style:
normal">(http://tex.stackexchange.com/users/19356)</div><div style="width:450px; font-family: 'Georgia', 'Times', 'Times New Roman', 'serif'" contenteditable="false" id="enhancrCard_0" class=""><table class="" cellspacing="0" cellpadding="0" style="width:450px; height:170px; display: block"><tbody class="" style=""><tr class="" style=""><td colspan="6" class="" style="height: 1px; background-color: #e5e5e5"><div class="" style="height: 1px; background-color: #e5e5e5"></div></td></tr><tr class="" style=""><td rowspan="2" class="" style="width: 1px; background-color: #e5e5e5"><div class="" style="width: 1px; background-color: #e5e5e5"></div></td><td class="" rowspan="2" style="vertical-align: middle; width: 168px; height: 168px; background-color: #000000"><div class="" style="width: 168px" align="center"><a href="http://i.stack.imgur.com/mVTOu.gif" class="" style="text-decoration: none !important; color: #000000 !important"><img alt="image"
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