MathGroup Archive 2009

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Assuming odd/even functions


How can we give Mathematica the information of a function being odd or even, and have it applied automatically or in a Simplify[]?

Such that, if e.g. f[y] is odd, the sum f(a)+f(-a) yields zero, the 
integral Integrate[f[y], {y, -a, a}] vanishes?

--Martin


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