Mathematica 9 is now available
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

differential equation solve

  • To: mathgroup at smc.vnet.net
  • Subject: [mg68821] differential equation solve
  • From: "elvis" <rapstone at gmail.com>
  • Date: Sun, 20 Aug 2006 04:43:39 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Here we often use mathematica to solve differential equations, when I
encouter a equation with several constrains I set them to those values.
But it cannot solve it and have the following warnings:

    DSolve::deqx: Supplied equations are not differential equations of
the given functions.

Give a very simple differential equation here:

  DSolve[{y'[x] == r*y[x], y[0] == a}, y, x]

another equation:

\!\(DSolve[{\(x'\)[t] == r*x[t] \((1 - x[t]\/xm)\), x[0] == x0}, x,
t]\)

this face anothe prolbem

Can anyone help to "solve" this problem for me?
Thanks!


  • Prev by Date: solve differential equation problem
  • Next by Date: LegendPosition Problem
  • Previous by thread: Re: solve differential equation problem
  • Next by thread: Re: differential equation solve