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Question: Why is Maple so slow with the following integral calculations?

Question:Why is Maple so slow with the following integral calculations?

Andriy 270
integral
November 23 2013
0


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restart

with(plots)
u := proc (x) options operator, arrow; int(exp(-(x-xi)^2)*f(xi), xi = -infinity .. infinity, numeric) end proc; f := proc (x) options operator, arrow; 1/(1+x^2) end proc; u(4.0); plot(u(x), x = -10 .. 10)

.1139815572

 (1)
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Is there a way to speed up the calculations?
Thank you.

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