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[u/mrichter/AliRoot.git] / LHAPDF / lhapdf5.3.1 / eksarp.f
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4e9e3152 1 function eksarp(x,v2,x1,x116,ptm,indpi)
2 IMPLICIT DOUBLE PRECISION (A-H,O-Z)
3 dimension ptm(10)
4
5 z=v2
6 xx=x-x1
7 if (x.le.x116) then
8 eksarp=ptm(1)+ptm(2)*z+ptm(3)*z**2+ptm(4)*xx+ptm(5)*xx**2
9 else
10 z1= log(x116/x1)
11 xx1=x116-x1
12 ff0=ptm(1)+ptm(2)*z1+ptm(3)*z1**2+ptm(4)*xx1+ptm(5)*xx1**2
13 xx16=x-x116
14 z16= log(x/x116)
15 qexp=19.d0+(indpi-1)*(indpi-2)*8.d0/2.d0
16 eksarp=ff0+ptm(6)*xx16+ptm(7)*xx16**2+ptm(8)*xx16**3
17 + +ptm(9)*xx16**qexp+ptm(10)*z16
18 endif
1911 return
20 end
21
22