【摘要】 <正> 1) Ω为R²中的有规则边界的有界开集,边界为Γ,Ω′,为（?）=Ω+Γ的补集,u为Γ的外法向; 2) 边界已知函数ψ_s∈H^4-1/2-S（Γ）（S=0,1,2,3）依迹定理,总可以找到一个有紧支集的函数ψ∈H⁴（R²）,使更多还原

【Abstract】 Finding the solution of the Dirichlet problem of a fourfold harmonic equation of two dimensional space may be reduced to solution of an integral equation system on the boundary Γ. In this paper, by introducing four varibles q0, q1, q2, and q3, on the boundary:We obtain an intergral equation system equivalent to a variational problem and obtain solution u of the Dirichlet problem.更多还原