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SUBROUTINE ddpoly(c,nc,x,pd,nd)
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INTEGER nc,nd
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REAL x,c(nc),pd(nd)
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INTEGER i,j,nnd
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REAL const
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pd(1)=c(nc)
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do 11 j=2,nd
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pd(j)=0.
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11 continue
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do 13 i=nc-1,1,-1
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nnd=min(nd,nc+1-i)
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do 12 j=nnd,2,-1
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pd(j)=pd(j)*x+pd(j-1)
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12 continue
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pd(1)=pd(1)*x+c(i)
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13 continue
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const=2.
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do 14 i=3,nd
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pd(i)=const*pd(i)
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const=const*i
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14 continue
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return
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END
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