TTwo dimension 假设区域Ω是个长方形{xo,x1]×[0o,y],边界与坐标 平行。我们作区域离散,设x方向和y方向的步长分别 为h1和h2 0+ab1 =0.1.2 9=90+ih2,j=0,1,2, difference methods for BVP 2003, Fudan University, Chen Wenbin-p. 14/50Two dimension Ω [x 0, x 1] × [y 0, y 1] x y h 1 h 2 x i = x 0 + ih 1, i = 0, 1, 2, · · · , N1 yj = y 0 + ih 2, j = 0, 1, 2, · · · , N2 difference methods for BVP, 2003, Fudan University, Chen Wenbin – p.14/50