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product over a range. On the R side, this function just returns the product of the first argument, but allows for decorations.
prod_over(x, from, to)
The function returns prod(x)
the object to be multiplied
decoration for prod_from^to x_i
prod(), sum_over()
prod()
sum_over()
mathjax(quote(prod_over(x[i], i=1L, N)))
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