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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
# ADOT -- Vector inner or dot product. The function value is the sum of the
# products of each pair of elements of the input vectors.
double procedure adotd (a, b, npix)
double a[ARB], b[ARB]
double sum
int npix, i
begin
sum = 0.0D0
do i = 1, npix
sum = sum + a[i] * b[i]
return (sum)
end
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