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

8 votes
0 answers
682 views

In need of help with parsing non-Archimedean function theory

My current work revolves around studying functions from the $p$-adic integers to the $q$-adic rationals, where $p$ and $q$ are distinct primes ("$(p,q)$-adic functions", as I call them). I've been fam …
1 vote
0 answers
62 views

Properties of the Fourier Transform of Countably Supported Functions on $[0,1)$

Identifying $\mathbb{R}/\mathbb{Z}$ with the interval $\left[0,1\right)$, let $C_{\textrm{coun}}\left(\mathbb{R}/\mathbb{Z}\right)$ denote the set of all functions $f:\mathbb{R}/\mathbb{Z}\rightarrow\ …
1 vote
0 answers
66 views

Approximate identities on the unit disk and going beyond a power series' radius of convergence

Let $\left\{ a_{n}\right\} _{n\geq0}$ be a bounded sequence of complex numbers, so that the power series $f\left(z\right)=\sum_{n=0}^{\infty}a_{n}z^{n}$ has a radius of convergence $\geq1$. Additional …
3 votes
0 answers
332 views

A.C.M. van Rooij's *Non-archimedean functional analysis* (1978) is very out-of-print! Anyone...

(This is a literature/reference question.) So... long story short: (1) In my present research, I needed a theory of continuous functions from the $p$-adic integers to the $q$-adic integers. Unable t …
1 vote
0 answers
53 views

A different kind of weighted Hardy space

Let $\mathbb{D}$ denote the open unit disk in $\mathbb{C}$, let $\mathcal{A}\left(\mathbb{D}\right)$ denote the vector space of all complex-valued functions which are holomorphic on $\mathbb{D}$, and …
2 votes
0 answers
65 views

Closure of the space of holomorphic functions on the open disk in $\mathbb{C}$ with respect ...

Let $\mathcal{A}\left(\mathbb{D}\right)$ denote the vector space over $\mathbb{C}$ of all holomorphic functions $f:\mathbb{D}\rightarrow\mathbb{C}$. Define the following semi-norm:$$\left\Vert f\right …