Change of scale formulas for a generalized conditional Wiener integral
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Let $C[0,t]$ denote the space of real-valued continuous functions on $[0,t]$ and define a random vector $Z_n:C[0,t]\to\mathbb R^n$ by $Z_n(x)=(\int_0^{t_1}h(s) dx(s),\ldots,\int_0^{t_n}h(s) dx(s))$, where $0<t_1 < \cdots < t_n=t$ is a partition of $[0,t]$ and $h\in L_2[0,t]$ with $h\neq 0$ a.e. Using a simple formula for a conditional expectation on $C[0,t]$ with $Z_n$, we evaluate a generalized analytic conditional Wiener integral of the function $G_r(x) = F(x)\Psi(\int_0^t v_1 (s) dx(s),\ldots,\int_0^t v_r(s)dx(s))$ for $F$ in a Banach algebra and for $\Psi=f+\phi $ which need not be bounded or continuous, where $f\in L_p(\mathbb R^r)(1\le p\le\infty)$, $\{v_1,\ldots,v_r\}$ is an orthonormal subset of $L_2[0,t]$ and $\phi$ is the Fourier transform of a measure of bounded variation over $\mathbb R^r$. Finally we establish various change of scale transformations for the generalized analytic conditional Wiener integrals of $G_r$ with the conditioning function $Z_n$.
Abstract
Let $C[0,t]$ denote the space of real-valued continuous functions on $[0,t]$ and define a random vector $Z_n:C[0,t]\to\mathbb R^n$ by $Z_n(x)=(\int_0^{t_1}h(s) dx(s),\ldots,\int_0^{t_n}h(s) dx(s))$, where $0<t_1 < \cdots < t_n=t$ is a partition of $[0,t]$ and $h\in L_2[0,t]$ with $h\neq 0$ a.e. Using a simple formula for a conditional expectation on $C[0,t]$ with $Z_n$, we evaluate a generalized analytic conditional Wiener integral of the function $G_r(x) = F(x)\Psi(\int_0^t v_1 (s) dx(s),\ldots,\int_0^t v_r(s)dx(s))$ for $F$ in a Banach algebra and for $\Psi=f+\phi $ which need not be bounded or continuous, where $f\in L_p(\mathbb R^r)(1\le p\le\infty)$, $\{v_1,\ldots,v_r\}$ is an orthonormal subset of $L_2[0,t]$ and $\phi$ is the Fourier transform of a measure of bounded variation over $\mathbb R^r$. Finally we establish various change of scale transformations for the generalized analytic conditional Wiener integrals of $G_r$ with the conditioning function $Z_n$.
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