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This article is cited in 1 scientific paper (total in 1 paper)
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On Causal Invertibility with Respect to a Cone of Integral-Difference Operators in Vector Function Spaces
V. G. Kurbatov Lipetsk State Technical University
Abstract:
Let $\mathbb{S}$ be a cone in $\mathbb{R}^n$. A bounded linear operator $T\colon L_p(\mathbb{R}^n)\to L_p(\mathbb{R}^n)$ is said to be causal with respect to $\mathbb{S}$ if the implication
$$
x(s)=0\;\;(s\in W-\mathbb{S})\implies(Tx)(s)=0\;\;(s\in W-\mathbb{S})
$$
is valid for any $x\in L_p(\mathbb{R}^n)$ and any open subset $W\subseteq\mathbb{R}^n$. The set of all causal operators is a Banach algebra. We describe the spectrum of the operator
$$
(Tx)(t)=\sum_{n=1}^\infty a_n x(t-t_n)+ \int_{\mathbb{S}}g(s)x(t-s)\,ds,\qquad t\in\mathbb{R}^n,
$$
in this algebra. Here $x$ ranges in a Banach space $\mathbb{E}$, the $a_n$ are bounded linear operators in $\mathbb{E}$, and the function $g$ ranges in the set of bounded operators in $\mathbb{E}$.
Keywords:
causal invertibility, causal operator, difference operator, integral operator, convolution, Gelfand transform, tensor product, light cone.
Received: 19.11.2003
Citation:
V. G. Kurbatov, “On Causal Invertibility with Respect to a Cone of Integral-Difference Operators in Vector Function Spaces”, Funktsional. Anal. i Prilozhen., 39:3 (2005), 84–87; Funct. Anal. Appl., 39:3 (2005), 233–235
Linking options:
https://www.mathnet.ru/eng/faa78https://doi.org/10.4213/faa78 https://www.mathnet.ru/eng/faa/v39/i3/p84
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