看板
[ Math ]
討論串[微積] 偏微分
共 21 篇文章
內容預覽:
R = 0 ,. Θ'' - λΘ = 0. 2. r R'' + r R' + λ R = 0. 2. λ < 0 , λ = -ω ,. ω -ω. R = c1 r + c2 r. ω -ω. R(a) = c1 a + c2 a = 0. ω -ω. R(b) = c1 b + c2 b =
(還有637個字)
內容預覽:
(D.E.) Uxx+Uyy=0 0<x<pi 0<y<pi. (B.C.) Ux(0,y)=Ux(pi,y)=0 0<=y<=pi. Uy(x,0)=0 Uy(x,pi)=x-pi/2 0<=x<=pi. 我用分離變數法解到. Xn(x)=cos(nx),Yn(y)=d1ncosh(ny) whe
(還有38個字)