Hi,

My calculus is a bit rusty, and I'm trying to do the following.

sage: x,a = var("x a")
sage: sinc(x) = sin(pi*x)/(pi*x)
sage: L = sinc(x)*sinc(x/3)
sage: L
3*sin(1/3*pi*x)*sin(pi*x)/(pi^2*x^2)

sage: L.integrate(x)
3*integrate(sin(1/3*pi*x)*sin(pi*x)/x^2, x)/pi^2


...which doesn't help me much, as it still has an integral in it.

Is this function not integrable for some reason, or is it a limitation  
of sage?

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