English

Classification of integro-differential $C^*$-algebras

Operator Algebras 2020-02-18 v3 Functional Analysis

Abstract

The integro-differential algebra FN,M\mathscr{F}_{N,M} is the CC^*-algebra generated by the following operators acting on L2([0,1)NCM)L^2([0,1)^N\to\mathbb{C}^M): 1) operators of multiplication by bounded matrix-valued functions, 2) finite differential operators, 3) integral operators. We give a complete characterization of FN,M\mathscr{F}_{N,M} in terms of its Bratteli diagram. In particular, we show that FN,M\mathscr{F}_{N,M} does not depend on MM but depends on NN. At the same time, it is known that differential algebras HN,M\mathscr{H}_{N,M}, generated by the operators 1) and 2), do not depend on both dimensions NN and MM, they are all *-isomorphic to the universal UHF-algebra. We explicitly compute the Glimm-Bratteli symbols (for HN,M\mathscr{H}_{N,M} it was already computed earlier) n(FN,M)=n=1(n0n11)N(11)N,    n(HN,M)=n=1n, \mathfrak{n}(\mathscr{F}_{N,M})=\prod_{n=1}^{\infty}\begin{pmatrix} n & 0 \\ n-1 & 1 \end{pmatrix}^{\otimes N}\begin{pmatrix}1 \\ 1 \end{pmatrix}^{\otimes N},\ \ \ \ \mathfrak{n}(\mathscr{H}_{N,M})=\prod_{n=1}^{\infty}n, which characterize completely the corresponding AF-algebras.

Keywords

Cite

@article{arxiv.1911.09440,
  title  = {Classification of integro-differential $C^*$-algebras},
  author = {Anton A. Kutsenko},
  journal= {arXiv preprint arXiv:1911.09440},
  year   = {2020}
}
R2 v1 2026-06-23T12:23:18.850Z