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Banach spaces, function spaces, real functions, integral transforms, theory of distributions, measure theory.

1 vote

Radial Kernel with Bounded Support and Norm of Gradient Bounded by a Dimension-free Constant

note: This is not a complete answer, but I think it helps clarify the problem. Since $K$ is radial, the problem can be formulated in terms of the profile function $\phi$. If we let $r=\|x\|_2$, then …
Dunham's user avatar
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2 votes
1 answer
266 views

Is a Fréchet Montel space distinguished?

Based on a couple of references, it seems that the answer is yes, see for example Boneta-Dierolf, 1992 and Bierstedt-Bonet, 1989. However, from a comment to the answer of this MO question, I infer th …
2 votes

Interpolation between $L_p$ and $B^s_{q,q}$

See Equation (8.33) of Triebel, Spaces of distributions of Besov type on Euclidean n-space. Duality, interpolation, 1973. (MR0348483)
Dunham's user avatar
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1 vote

Paley-Wiener type theorem for integral functions with compact support

Unni addresses $L^p$ Paley Wiener type theorems for Hankel transforms in (MR0174941). In the introduction, he also lists references for $L^p$ Paley Wiener theorems for Fourier transforms.
Dunham's user avatar
  • 323
3 votes

Heuristic interpretation of the 'third index' for Besov and Triebel-Lizorkin spaces

Let us look at the definition of Besov spaces from [Bergh and Löfström, 1976]. Suppose $\varphi:\mathbb{R}\rightarrow\mathbb{R}$ is a Schwartz class function satisfying the support of $\varphi$ is …
Dirk's user avatar
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