ρ(x) = div(p(x)∇u) + q(x)u + f(x, t)
q(x, t) ≤ 0
f1(x, t) ≤ 0
ГT = Г1 ∪ Г2,T = {(x, t): x ∈ , t = 0} ∪ {(x, t): x ∈ , 0 ≤ t ≤ T}