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<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">I think someone on the list requested arcs with curved arrowheads.</font></div>
<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">Here is one suggestion - which probably could be greatly improved....</font></div>
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<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">Poul Riis</font></div>
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<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">\usepackage{pstricks-add}</font></div>
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<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">\pstVerb{</font></div>
<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;"> /pi 3.141592 def</font></div>
<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">/newarcarrow { %def</font></div>
<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">gsave</font></div>
<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">/lw exch def /endang exch def /startang exch def 5.69 mul /rr exch def 5.69 mul /cy exch def 5.69 mul /cx exch def lw setlinewidth 5 lw mul /ahsize exch def endang startang sub abs pi mul 180 div rr 1 add mul /smallahsize exch def 5 smallahsize gt {smallahsize /ahsize exch def} if startang endang lt {/psi rr 1 add ahsize exch div 57 mul neg def cx cy rr startang endang psi add arc stroke} {/psi rr 1 add ahsize exch div 57 mul def cx cy rr endang psi add startang arc stroke} ifelse endang cos rr mul cx add endang sin rr mul cy add moveto 10 10 360 {/ii exch def 3 ii cos 2 mul sub ii 2 mul cos sub 2 mul 9 div /xf exch def ii sin 2 mul ii 2 mul sin sub 9 div /yf exch def endang psi xf mul add /actang exch def rr ahsize yf mul add /actrr exch def actang cos actrr mul cx add actang sin actrr mul cy add lineto} for closepath fill
stroke</font></div>
<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">grestore</font></div>
<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">newpath</font></div>
<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">} bind def</font></div>
<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">}%</font></div>
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<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">\code{1 0 0 setrgbcolor 0 0 5 0 120 5 newarcarrow 0 1 0 setrgbcolor 0 0 5 120 240 5 newarcarrow 0 0 1 setrgbcolor 10 10 5 0 360 5 newarcarrow}%(xstart, ystart, radius, startang, endang, linewidth)</font></div>
<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">}</font></div>
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