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Real-valued functions of real variable, analytic properties of functions and sequences, limits, continuity, smoothness of these.

2 votes
0 answers
140 views

Riesz transform of constant function

My one-line question would be, what is the Riesz transform of the constant function, identically equal to 1 on $\mathbb{R}^2$? But more fundamentally, my question stems from some confusion about the d …
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1 vote
1 answer
234 views

Convergence of oscillatory integrals

I'm considering integrals of the (Hilbert transform) type $$p.v.\int_{-\infty}^\infty\frac{f(r)}{r}\,dr$$ where $f(r)$ is periodic, say, with period $2\pi$. I'm assuming very little regularity on $f$. …
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