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\title{\bf Finite Volume Difference Methods for Convection-Dominated 
Problems with Interface}

\author{Iliya Brayanov$^\dag$, Lubin Vulkov$^\ddag$\\
Center of Apllied Mathematics and Informatics \\
University of Ruse, 7017 Ruse, Bulgaria\\
$^\dag$E-mail: braianov@ami.uni-ruse.bg, \\
$^\ddag$E-mail: vulkov@ami.uni-ruse.bg} 

\date{} 

\begin{document} 

\maketitle   

In this paper we developed the sell-centered finite difference schemes  
for two dimensional singularly perturbed convection-diffusion problems 
$$ Lu(x,y)=-\varepsilon \Delta u +a_1u_x + a_2 u_y + bu=f(x,y)$$  
with  interface $\Gamma$. 

Theoretical results and numerical experiments for   
fitted-operator and fitted  mesh (Shishkin's mesh) 
approximations are   presented.

\end{document}