Mathematics – Classical Analysis and ODEs
Scientific paper
2011-10-17
Mathematics
Classical Analysis and ODEs
To appear in Czechoslovak Mathematical Journal
Scientific paper
Let $\Bc$ denote the real-valued functions continuous on the extended real line and vanishing at $-\infty$. Let $\Br$ denote the functions that are left continuous, have a right limit at each point and vanish at $-\infty$. Define $\acn$ to be the space of tempered distributions that are the $n$th distributional derivative of a unique function in $\Bc$. Similarly with $\arn$ from $\Br$. A type of integral is defined on distributions in $\acn$ and $\arn$. The multipliers are iterated integrals of functions of bounded variation. For each $n\in\N$, the spaces $\acn$ and $\arn$ are Banach spaces, Banach lattices and Banach algebras isometrically isomorphic to $\Bc$ and $\Br$, respectively. Under the ordering in this lattice, if a distribution is integrable then its absolute value is integrable. The dual space is isometrically isomorphic to the functions of bounded variation. The space $\ac^1$ is the completion of the $L^1$ functions in the Alexiewicz norm. The space $\ar^1$ contains all finite signed Borel measures. Many of the usual properties of integrals hold: H\"older inequality, second mean value theorem, continuity in norm, linear change of variables, a convergence theorem.
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