Re: NDSolve[]
- To: mathgroup at smc.vnet.net
- Subject: [mg123538] Re: NDSolve[]
- From: Stephen Wandzura <smwandzura at hrl.com>
- Date: Sat, 10 Dec 2011 07:30:44 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <201112091058.FAA03928@smc.vnet.net>
- Reply-to: Stephen Michael Wandzura <wandzura at mac.com>
You are confusing Derivative[] with D[].
> Subject: NDSolve[]
> To: mathgroup at smc.vnet.net
>
> For the same equations, why does the first method as following give
> the error but the other one give the desired result?
>
> NDSolve[{Derivative[x[t], t] == -y[t] - x[t]^2,
> Derivative[y[t], t] == 2*x[t] - y[t], x[0] == y[0] == 1}, {x,
> y}, {t, 10}]
>
> NDSolve[{x'[t] == -y[t] - x[t]^2, y'[t] == 2*x[t] - y[t],
> x[0] == y[0] == 1}, {x, y}, {t, 10}]
>
- References:
- [no subject]
- From: "Steven M. Christensen" <steve@smc.vnet.net>
- [no subject]