Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2006
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2006

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Differential equation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg69492] Re: Differential equation
  • From: "ben" <benjamin.friedrich at gmail.com>
  • Date: Thu, 14 Sep 2006 06:55:28 -0400 (EDT)
  • References: <ee8gca$imk$1@smc.vnet.net>

Hi Mike,

this cannot work:
you have two degrees of freedom (x and y),
but only one ODE; you need as many ODEs
as you have degrees of freedom.

However, you can express y in terms of x

x(t)-A*dy/dt=0
A*dy/dt=x
dy/dt=A^-1 * x
dy=A^-1 * x dt
y(t)-y(0)=\int_0^t dt' A^-1 x(t')

Bye
Ben



Mike schrieb:

> Dear all,
>
> I would kindly ask for an assistance please.
> I do not know how to solve this differential equation :
>
> x(t)-A*dy/dt=0
>
> Where,
> A - constant
> x - variable as a function of time (t)
> y - variable as a function of time (t)
> t - time
> 
> 
> Thanks Mike77


  • Prev by Date: Re: Differential equation
  • Next by Date: xvnc Mathematica menu fonts
  • Previous by thread: Re: Differential equation
  • Next by thread: Re: Differential equation