A Banach algebra and its equivalent spaces over paths with a positive measure
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Let $C[0,T]$ denote the space of continuous, real-valued functions on the interval $[0,T]$ and let $C_0[0,T]$ be the space of functions $x$ in $C[0,T]$ with $x(0)=0$. In this paper, we introduce a Banach algebra $\bar{\mathcal S}_{\alpha,\beta;\varphi}$ on $C[0,T]$ and its equivalent space $\bar{\mathcal F}(\mathcal H)$, a space of transforms of equivalence classes of measures, which generalizes Fresnel class ${\mathcal F}(\mathcal H)$, where $\mathcal H$ is an appropriate real separable Hilbert space of functions on $[0,T]$. We also investigate their properties and derive an isomorphism between $\bar{\mathcal S}_{\alpha,\beta;\varphi}$ and $\bar{\mathcal F}(\mathcal H)$. When $C[0,T]$ is replaced by $C_0[0,T]$, $\bar{\mathcal F}(\mathcal H)$ and $\bar{\mathcal S}_{\alpha,\beta;\varphi}$ reduce to ${\mathcal F}(\mathcal H)$ and Cameron-Storvick's Banach algebra $\mathcal S$, respectively, which is the space of generalized Fourier-Stieltjes transforms of the complex-valued, finite Borel measures on $L^2[0,T]$.
Abstract
Let $C[0,T]$ denote the space of continuous, real-valued functions on the interval $[0,T]$ and let $C_0[0,T]$ be the space of functions $x$ in $C[0,T]$ with $x(0)=0$. In this paper, we introduce a Banach algebra $\bar{\mathcal S}_{\alpha,\beta;\varphi}$ on $C[0,T]$ and its equivalent space $\bar{\mathcal F}(\mathcal H)$, a space of transforms of equivalence classes of measures, which generalizes Fresnel class ${\mathcal F}(\mathcal H)$, where $\mathcal H$ is an appropriate real separable Hilbert space of functions on $[0,T]$. We also investigate their properties and derive an isomorphism between $\bar{\mathcal S}_{\alpha,\beta;\varphi}$ and $\bar{\mathcal F}(\mathcal H)$. When $C[0,T]$ is replaced by $C_0[0,T]$, $\bar{\mathcal F}(\mathcal H)$ and $\bar{\mathcal S}_{\alpha,\beta;\varphi}$ reduce to ${\mathcal F}(\mathcal H)$ and Cameron-Storvick's Banach algebra $\mathcal S$, respectively, which is the space of generalized Fourier-Stieltjes transforms of the complex-valued, finite Borel measures on $L^2[0,T]$.
참고문헌 (10)
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