How can I proof this?
$\int_0^\infty \int_0^\infty |\sin x| \,\, e^{-xy} \,\, dx \,\, dy < \infty$
I tried to say $\int_0^\infty \int_0^\infty |\sin x| \,\, e^{-xy} \,\, dx \,\, dy \leq \int_0^\infty \int_0^\infty e^{-xy} \,\, dx \,\, dy$ but that didn't help since the right side is $\infty$. All other ideas failed as well.
My "main idea" was to use Tonelli Fubini:
$\int_0^\infty \int_0^\infty |\sin x| \,\, e^{-xy} \,\, dy \,\,dx = \int_0^{\infty} \frac{1}{x} |\sin(x)| \,\,dx$
But I don't know how to continue here now. I tried again to say $\int_0^{\infty} \frac{1}{x} |\sin(x)| \,\,dx \leq \int_0^{\infty} \frac{1}{x} \,\,dx$ but the right side is $\infty$ again.
For Tonelli it would be also enough to check $\int_0^\infty \int_0^\infty |\sin x| \,\, e^{-xy} \,\, dx \,\,dy$ about finity, but here I get no better result.