2007年11月15日

characteristic curves
摘要： the solution surface as being made up of a family of curves on each of which the direction of the tangent to the curve at each point is given by the set of drieciton numbers(a,b,c) a(x,y,u)Ux + b(x,y... 阅读全文
posted @ 2007-11-15 03:51 cloudseawang 阅读(219) 评论(0) 推荐(0) 编辑

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