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DSolve problems with system of ODEs. Out in pure notation?

• To: mathgroup at smc.vnet.net
• Subject: [mg21709] DSolve problems with system of ODEs. Out in pure notation?
• From: "J.Guillermo Sanchez" <guillerm at gugu.usal.es>
• Date: Sun, 23 Jan 2000 01:52:29 -0500 (EST)
• References: <200001210900.EAA06601@smc.vnet.net> <200001220753.CAA11688@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

If I evaluate,

DSolve[{x'[t] == -0.036 x[t] + 0.0124 y[t] + 0.000035 z[t] + 49.3,
    y'[t] == 0.0111 x[t] - 0.0286 y[t], z'[t] == 0.0039 x[t] - 0.000035
z[t],
    x[0] == 0, y[0] == 0, z[0] == 0}, {x[t], y[t], z[t]}, t]

I receive a massage like this
(RootSum::"pfn" :
    "(DSolve`DSolveDump`dysfunction$6[273147 + <<1>>...
is not a pure function.).
and them a out in pure notation.

But I want to receive the solution in standard notation.

Also the same sentece work fine in Mathematica 2.2.

Can anyone give a hand?

• References:
  • Intersection of 2 subspaces
    • From: RENAULT Fabien <renaulf1@cti.ecp.fr>
  • Re: Intersection of 2 subspaces
    • From: Daniel Lichtblau <danl@wolfram.com>