content_image/308971.jpg content_image/308975.jpg content_image/308972.jpg
By Lemma 2 we have 

for 0 ≤ ∣ $_{β}$′ ∣ ≤ 2, 1 ≤ j ≤ n . Thus it follows from equalities (4.7), (A.14) and (A.15) that 1 

<img src='content_image/308971.jpg'>

where x 1 0 is the first component of the boundary point ( x 1 $_{0}$, x ′ ) ∈ ∂D and the first component of ( x $^{1}$, x ′ ) ∈ D satisfies x 1 > x 1 $_{0}$. In (A.16), the components of the vector $_{ζ}$′$_{(}$$_{τ , ξ}$ ′$_{) = (}$$_{ζ}$ $^{2}$( $_{τ , ξ}$′$_{)}$$_{, ..., ζ}$ $^{n}$( $_{τ , ξ}$′$_{)) satisfy the system of differential equations}$ 

the integrals 

are continuous on D × G ′ . 

<img src='content_image/308975.jpg'>

<img src='content_image/308972.jpg'>

