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Apr 5, 2016 at 20:06 comment added Funktorality For $n$ functions one can write $H(f_1,\ldots,f_n)=\frac{i^n}{n!}D_y^{n-1}sgn(D_y)\prod_{i=1}^n(f_i(x)-f_i(y))$.
Apr 5, 2016 at 17:18 comment added Funktorality The addendum looks like what I was hoping for, thanks!
Apr 5, 2016 at 17:18 vote accept Funktorality
Apr 5, 2016 at 12:18 history edited Iosif Pinelis CC BY-SA 3.0
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Apr 5, 2016 at 12:07 history edited Iosif Pinelis CC BY-SA 3.0
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Apr 5, 2016 at 11:58 comment added Iosif Pinelis I have added an explanation of how to express $T(f_1,\dots,f_n)$ in terms of the $(n-1)$th derivative of the Hilbert transform.
Apr 5, 2016 at 11:55 history edited Iosif Pinelis CC BY-SA 3.0
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Apr 4, 2016 at 23:11 comment added Funktorality That's the one. Maybe I can write this integral in that form.
Apr 4, 2016 at 22:08 comment added Iosif Pinelis Do you mean like formula (12) in Coifman et al.? There you need to differentiate an approximate $\epsilon$-Hilbert transform $n$ times and then let $\epsilon\to0$.
Apr 4, 2016 at 21:26 comment added Funktorality I see, that seems to work. I'm still wondering though if you can write it in terms of Hilbert transforms.
Apr 4, 2016 at 20:58 history answered Iosif Pinelis CC BY-SA 3.0