Re: For help about NSolve

*To*: mathgroup at smc.vnet.net*Subject*: [mg88327] Re: [mg88305] For help about NSolve*From*: "W_Craig Carter" <ccarter at mit.edu>*Date*: Fri, 2 May 2008 03:41:05 -0400 (EDT)*References*: <200805010720.DAA26104@smc.vnet.net>

Hello xxhai, It does give a solution (perhaps not unique), but not a very interesting one: ode = D[y[x], {x, 2}] + y[x] (1 + D[y[x], x]^(3/2)) nsol = NDSolve[{ode == 0, y[0] == 0, y[1] == 0}, y[x], x] Plot[y[x] /. nsol, {x, 0, 1}] Table[y[x] /. nsol, {x, 0, 1, .1}] However ode = D[y[x], {x, 2}] + y[x] (1 + D[y[x], x]^(3/2)) nsol = NDSolve[{ode == 0, y[0] == 0, y[1] == 1}, y[x], x] Plot[y[x] /. nsol, {x, 0, 1}] is more interesting---perhaps the question is in regard to your boundary conditions? If not, take a look at the option Method and the final example in NDSolve (6.0 Documentation) Best Wishes, Craig On Thu, May 1, 2008 at 3:20 AM, xxhai <45417003 at 163.com> wrote: > Differential Equation: > y[x]''+y[x]*{(1+y[x]'^2)}^(3/2)=0 > > aboundery condition: y[0]=0, y[1]=0 > > For Numerical Solution ? > > why Mathematica can't solve the Equation with the initial condition ? > > please give the correct program for differential equation. > > > thank you a lot. > > > -- W. Craig Carter

**References**:**For help about NSolve***From:*xxhai <45417003@163.com>