Electron. J. Diff. Equ., Vol. 2014 (2014), No. 160, pp. 1-13.

Stability of parabolic equations with unbounded operators acting on delay terms

Allaberen Ashyralyev, Deniz Agirseven

In this article, we study the stability of the initial value problem for the delay differential equation
 \frac{dv(t)}{dt}+Av(t)=B(t)v(t-\omega )+f(t),\quad t\geq 0,\cr
 v(t)=g(t)\quad (-\omega \leq t\leq 0)
in a Banach space E with the unbounded linear operators A and B(t) with dense domains $D(A)\subseteq D(B(t))$. We establish stability estimates for the solution of this problem in fractional spaces $E_{\alpha }$. Also we obtain stability estimates in Holder norms for the solutions of the mixed problems for delay parabolic equations with Neumann condition with respect to space variables.

Submitted April 14, 2014. Published July 21, 2014.
Math Subject Classifications: 35K30.
Key Words: Delay parabolic equation; stability estimate; fractional space; Holder norm.

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Allaberen Ashyralyev
Department of Mathematics, Fatih University
34500 Buyukcekmece
Istanbul, Turkey
email: aashyr@fatih.edu.tr
Deniz Agirseven
Department of Mathematics, Trakya University
22030, Edirne, Turkey
email: denizagirseven@yahoo.com

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