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

7 votes
0 answers
3k views

What is vague convergence and what does it accomplish?

For convenience, let's say that I have a locally compact Hausdorff space $X$ and am concerned with probability measures on its Borel $\sigma$-algebra $\mathcal{B}(X)$. Natural vector spaces to conside …
Greg Zitelli's user avatar
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5 votes
1 answer
858 views

Besicovitch Almost Periodic Functions a subspace of what?

The common example of a nonseparable Hilbert space comes from the collection of Besicovitch almost periodic function spaces. Starting with $L^p_{\text{loc}}(\mathbb{R})$ we look at those elements fini …
Greg Zitelli's user avatar
  • 1,124
0 votes
1 answer
432 views

What is the character that compactifies $\mathbb{R}$ through the Gelfand transform?

I'm a little embarassed that I can't answer this myself, so hopefully it will get answered very quickly. Let $X$ be locally compact, Hausdorff. Consider $\text{C}_\text{b}(X)$ the $C^*$-algebra of bo …
Greg Zitelli's user avatar
  • 1,124
23 votes
0 answers
1k views

Laplace Transform in the context of Gelfand/Pontryagin

Questions: Is there a class of objects (presumably related to locally compact abelian groups) for which the quasi-characters canonically generalize the Laplace transform? If not, is there a generaliz …
Greg Zitelli's user avatar
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11 votes
0 answers
363 views

Carleson's Theorem on Manifolds

Let $M$ be an oriented, compact, differentiable manifold with some Riemmanian metric $g$, so that $(M,g)$ has a nice volume form and one can define $L^2(M,g)$ as the completion of $C^\infty(M)$ under …
Greg Zitelli's user avatar
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