ABSTRACT

In an n-dimensional domain D, we consider the Dirichlet problem for the parabolic convection-diffusion equation

Lu(x, t)=f(x, t), (x, t) ∈ G, (7.1) u(x, t)=ϕ(x, t), (x, t) ∈ S.

Here G = G⋃S, G = D × (0, T ], (7.2)

the operator L is defined by the relations

L ≡ εL2 + L1;

L2 ≡ n∑

ask(x, t) ∂2

∂xs∂xk +

bs(x, t) ∂

∂xs − c(x, t);

L1 ≡ n∑ s=1

b1s(x, t) ∂

∂xs − c1(x, t)− p(x, t) ∂

∂t .