作者Nowitzness (Nowitzness)
看板Grad-ProbAsk
标题[理工] [工数]-P.D.E.
时间Mon Nov 16 01:15:19 2009
周易8-34页
By using Fourier transform,solve
2
@u @ u
— =—— +δ(x)δ(t),u(x,0)=δ(x) lim u(x,t)=0
2 x→±∞
@t @ x
1 π x^2
Ans:[—π√(—) ]*[1+H(t)]*exp[- — ]
2 t 4t
有请高手解答!感恩
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 125.224.74.94