DelR =
__fdividef( 1.0 , sqrt (2.0 * pie)) *__fdividef( exp(__fdividef(__fdividef(-(r - rp)^2 , 2.0) , wr^2)) , wr);
DelR1 =__fdividef( -(r - rp) , wr^2) * DelR;
DelR2 =
(__fdividef(__fdividef(-1.0, wr^2) + (r - rp)^2 , wr^4)) * DelR;
stheta =__sinf(th);
ctheta =__cosf(th);
DelTH =
__fdividef(1.0 , sqrt (2.0 * pie)) *__fdividef( exp(__fdividef(-(th - tp)^2,2.0) wt^2) , wt);
DelTH1 = __fdividef(__fdividef(-(th - tp) , wt) , wt) * DelTH;
DelTH2 =__fdividef(-1.0 , wt^2) +
__fdividef((th - tp)^2 , wt^4) * DelTH;
DelR =__fdividef( 1.0,(sqrt(2.0*pie)))*__fdividef(exp(__fdividef(__fdividef(-((r-rp)*(r-rp)),2.0),(wr*wr))),wr);
DelR1 =__fdividef( -(r - rp) ,( wr*wr)) * DelR;
DelR2 =
__fdividef(-1.0,( wr*wr)) + __fdivdef(((r - rp)(r-rp)) ,( wr*wr*wr*wr)) * DelR;
stheta =__sinf(th);
ctheta =__cosf(th);
DelTH =
__fdividef(1.0 , sqrt (2.0 * pie)) *__fdividef( exp(__fdividef(__fdividef(-((th - tp)*(th-tp)),2.0),( wt*wt))) , wt);
DelTH1 = __fdividef(-(th - tp) ,(wt* wt)) * DelTH;
DelTH2 =__fdividef(-1.0 ,( wt*wt)) +
__fdividef(((th - tp)*(th-tp)) ,( wt*wt*wt*wr)) * DelTH;
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