Error bounds for asymptotic expansions of Laplace convolutions. (English) Zbl 0806.41019
Summary: Asymptotic expansions are derived for the Laplace convolution \((f* g)(x)\) as \(x\to\infty\), where \(f\) and \(g\) have asymptotic power series representation in descending powers of \(t\). Bounds are also constructed for the error terms associated with these expansions. Similar results are given for the convolution integrals
\[
\int^ \infty_ 0 f(t)g(x+ t) dt\quad\text{and}\quad \int^ \infty_ 0 f(t)g(x- t) dt
\]
as \(x\to\infty\). These results can be used in the study of asymptotic solutions to the renewal equation and the Wiener-Hopf equations.
MSC:
41A60 | Asymptotic approximations, asymptotic expansions (steepest descent, etc.) |
45E10 | Integral equations of the convolution type (Abel, Picard, Toeplitz and Wiener-Hopf type) |