Re: natural log of a summation
- From: israel@xxxxxxxxxxx (Robert Israel)
- Date: 1 Apr 2005 19:06:36 GMT
In article <22993909.1112360651449.JavaMail.jakarta@xxxxxxxxxxxxxxxxxxxxxx>,
Adam Hartshorne <adam@xxxxxxxxxxxxxxxxx> wrote:
>Maybe I should ask a slightly different question. Given ln(Sum(f(x)),
>where f(x) is a basically a gaussian, i.e. contain an exp, is there any
>way of rearranging so that the ln goes inside the Summation?
There is no nice general formula for the logarithm of a sum.
Of course for certain special sums you can do something (e.g. perhaps
you can make your sum into a product).
Robert Israel israel@xxxxxxxxxxx
Department of Mathematics http://www.math.ubc.ca/~israel
University of British Columbia Vancouver, BC, Canada
.
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