Asymptotic behavior and representation of solutions to a Volterra kind of equation with a singular kernel
2016
Let $A$ be a densely defined closed, linear $\omega$-sectorial operator of angle $\theta\in [0,\frac{\pi}{2})$ on a Banach space $X$ for some $\omega\in\mathbb R$. We give an explicit representation (in terms of some special functions) and study the precise asymptotic behavior as time goes to infinity of solutions to the following diffusion equation with memory: $\displaystyle u'(t)=Au(t)+(\kappa\ast Au)(t), \, t >0$, $u(0)=u_0$, associated with the (possible) singular kernel
$\kappa(t)=\alpha e^{-\beta t}\frac{t^{\mu-1}}{\Gamma(\mu)},\;\;t>0$, where $\alpha\in\R$, $\alpha\ne 0$, $\beta\ge 0$ and $0<\mu\le 1$.
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