作者topractise (连月亮都帮我!)
看板trans_math
标题[张爸]
时间Thu Jul 5 20:31:41 2007
__________
Let w(x,y) = g(r) , where r =√x^2 + y^2 and g(r) , r > 0 is a function
使得 g''(r) is continuous, Assume (a) Wxx + Wyy = 0 , for all (x,y)≠(0,0)
(b) g(1) = 0 , g'(1) = 1 . Find function g(r)
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 59.112.27.113
1F：推 yuyumagic424:张爸晚安 140.112.239.90 07/05 21:18
2F：推 biox:√x^2 = x ？ 61.216.231.191 07/05 22:48
※ 编辑: topractise 来自: 59.112.29.41 (07/05 23:12)