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\example
\def\bilink(#1,#2)(#3,#4){%
\pcarc(#1,#2)(#3,#4)%
\pcarc[linestyle=dashed](#3,#4)(#1,#2)%
}
\hfil\kern3em\jtree[xunit=3em,yunit=1.8em,style=arrows2,
dirA=(-1:-1),branch=\bilink,nodesep=3pt,
arcangle=10,offset=1pt,labelgapt=!3pt]
\def\@{\pscircle(0,0){3pt}}%
\! =
{\pnode{A1}\@}
<right>{\omit\@\pnode(.8,-.8){A3}}
:({\omit\@}{C}) [scaleby=1.6,arcangle=7]{\omit\@}
:({\omit\@}{see})
({\omit\@\pnode{A2}}{who}[labeloffset=.8em]).
\nccurve[angleB=225,ncurvA=1.95,ncurvB=1,offset=1.6pt]{A1}{A2}
\nccurve[angleB=227,ncurvA=2,ncurvB=1.02,offset=-1.6pt,
linestyle=dashed,arrows=<-]{A1}{A2}
\rput(1.8,-1.8){\pscircle*[linecolor=white]{1em}}%
\rput(1.8,-1.8){\dots}
\endjtree
\vskip1.5em
\CL
\def\bilink(#1,#2)(#3,#4){%
\pcarc(#1,#2)(#3,#4)%
\pcarc[linestyle=dashed](#3,#4)(#1,#2)%
}
\jtree[xunit=3em,yunit=1.8em,style=arrows2,
dirA=(-1:-1),branch=\bilink,nodesep=3pt,
arcangle=10,offset=1pt,labelgapt=!3pt]
\def\@{\pscircle(0,0){3pt}}%
\! =
{\pnode{A1}\@}
<right>{\omit\@\pnode(.8,-.8){A3}}
:({\omit\@}{C}) [scaleby=1.6,arcangle=7]{\omit\@}
:({\omit\@}{see})
({\omit\@\pnode{A2}}{who}[labeloffset=.8em]).
\nccurve[angleB=225,ncurvA=1.95,ncurvB=1,offset=1.6pt]{A1}{A2}
\nccurve[angleB=227,ncurvA=2,ncurvB=1.02,offset=-1.6pt,
linestyle=dashed,arrows=<-]{A1}{A2}
\rput(1.8,-1.8){\pscircle*[linecolor=white]{1em}}%
\rput(1.8,-1.8){\dots}
\endjtree
|endCL
|