boundary condition

*To*: mathgroup at smc.vnet.net*Subject*: [mg99682] boundary condition*From*: gntw <bihjenleetw at gmail.com>*Date*: Mon, 11 May 2009 06:23:27 -0400 (EDT)

Hi friends, could anyone there tell me what's wrong with the following setup Clear[s] e = 0.001; k = 1; a = 0.1; pde = {0 == e*(D[u[x, y], x, x] + D[u[x, y], y, y])}; bc = {u[x, 0] == u[x, 2*Pi], u[1, y] == u[2, y], \!\( \*SubscriptBox[\(\[PartialD]\), \({x, 1}\)]\(u[x, 0]\)\) == \!\( \*SubscriptBox[\(\[PartialD]\), \({x, 1}\)]\(u[x, 2*Pi]\)\), \!\( \*SubscriptBox[\(\[PartialD]\), \({y, 1}\)]\(u[1, y]\)\) == \!\( \*SubscriptBox[\(\[PartialD]\), \({y, 1}\)]\(u[2, y]\)\)}; s = NDSolve[{pde, bc}, u, {x, 1, 2}, {y, 0, 2*Pi}];