\input psfig.sty
\input today

\tolerance=4000
\magnification=\magstep1
\parskip=4pt plus 6pt

\font\bigbf=cmbx12
\font\bigit=cmti12
\font\vbigbf=cmbx12 scaled \magstep1

\font\tencmr=cmr10
\font\eightcmr=cmr8
\font\sevencmr=cmr7
\font\fivecmr=cmr5
\newfam\cmrfam
\textfont\cmrfam=\tencmr
\scriptfont\cmrfam=\sevencmr
\scriptscriptfont\cmrfam=\fivecmr
\def\cmr{\fam\cmrfam}


\font\eusms=eusm7
\font\eusmf=eusm5
\newfam\eusmfam
\textfont\eusmfam=\eusms
\scriptfont\eusmfam=\eusmf
\scriptscriptfont\eusmfam=\eusmf
\def\eusm{\fam\eusmfam}

\font\tenbf=cmbx10
\font\eightbf=cmbx8
\font\sevenbf=cmbx7
\font\fivebf=cmbx5
\newfam\cmbxfam
\textfont\cmbxfam=\tenbf
\scriptfont\cmbxfam=\sevenbf
\scriptscriptfont\cmbxfam=\fivebf
\def\cmbx{\fam\cmbxfam}

\font\tenmsbm=msbm10
\font\sevenmsbm=msbm7
\font\fivemsbm=msbm5
\newfam\msbmfam
\textfont\msbmfam=\tenmsbm
\scriptfont\msbmfam=\sevenmsbm
\scriptscriptfont\msbmfam=\fivemsbm
\def\msbm{\fam\msbmfam}

\def\III{{\sevenrm III}}
\def\II{{\sevenrm II}}
\def\I{{\sevenrm I}}

\def\NN{{\msbm N}}
\def\ZZ{{\msbm Z}}
\def\QQ{{\msbm Q}}
\def\RR{{\msbm R}}
\def\CC{{\msbm C}}
\def\TT{{\msbm T}}
\def\SS{{\msbm S}}
\def\BB{{\msbm B}}

\def\rdois{{\RR^2}}
\def\Rdois{\RR^2}

\def\hbk{\hfill \break}
\def\nobf{\noindent \bf}
\def\nobigbf{\noindent\bigbf}
\def\qed{{\hfill\vrule height3pt width6pt depth3pt\smallskip}}

\def\bu{{$\circ$}}
\def\itembu#1{\item{$\circ$}{#1}}

\def\xoyo{(x_0,y_0)}
\def\gi{\Gamma_i}
\def\fgi{F(\Gamma_i)}

\def\Id{{\cmbx Id}}
\def\id{{\cmbx Id}}
\def\rr{{\cmbx r}}
\def\ll{{\cmbx l}}
\def\vv{{\cmbx v}}
\def\uu{{\cmbx u}}
\def\xx{{\cmbx x}}
\def\yy{{\cmbx y}}
\def\zz{{\cmbx z}}

\def\xtau{{\eusm T}}

\def\sgn{{\cmr sgn}}

\def\Cbu{{C_\bullet}}
\def\Fbu{{F_\bullet}}
\def\fbu{{f_\bullet}}
\def\ki{{\kappa_{\rm int}}}
\def\ke{{\kappa_{\rm ext}}}

\def\sP{{\cal P}}

\def\emptyset{/\kern -0.67em{\scriptstyle\bigcirc}}

\mathchardef\braceld="37A
\mathchardef\bracerd="37B

\def\m@th{\mathsurround=0pt }

\def\downbrakfill{$\m@th
\;\braceld\leaders\vrule\hfill\bracerd\;$}

\def\overbrak#1{\mathop{\vbox{\ialign{##\crcr\noalign{\kern3pt}
\downbrakfill\crcr\noalign{\kern3pt\nointerlineskip}
$\hfil\displaystyle{#1}\hfil$\crcr}}}\limits}

\def\sG{{\cal G}}
\def\Gm{{\cal G}}
\def\sM{{\cal M}}
\def\sR{{\cal R}}
\def\taub{{\overline\tau}}
\def\tr{{\hbox{tr}}}
\def\sc{{\sqrt{5}}}
\def\om{\omega}
\def\omb{{\overline\omega}}

