PDF/npdf/eksarp.F

   1 #include "pdf/pilot.h"
   2       function eksarp(x,v2,x1,x116,ptm,indpi)
   3 #include "pdf/impdp.inc"
   4       dimension ptm(10)
   5
   6       z=v2
   7       xx=x-x1
   8       if (x.le.x116) then
   9          eksarp=ptm(1)+ptm(2)*z+ptm(3)*z**2+ptm(4)*xx+ptm(5)*xx**2
  10          else
  11             z1= log(x116/x1)
  12             xx1=x116-x1
  13             ff0=ptm(1)+ptm(2)*z1+ptm(3)*z1**2+ptm(4)*xx1+ptm(5)*xx1**2
  14             xx16=x-x116
  15             z16= log(x/x116)
  16             qexp=19.d0+(indpi-1)*(indpi-2)*8.d0/2.d0
  17             eksarp=ff0+ptm(6)*xx16+ptm(7)*xx16**2+ptm(8)*xx16**3
  18      #             +ptm(9)*xx16**qexp+ptm(10)*z16
  19       endif
  20 11    return
  21       end
  22
  23