DSolve problems in version 3.0 and 4.0
- To: mathgroup at smc.vnet.net
- Subject: [mg33387] DSolve problems in version 3.0 and 4.0
- From: Diego Catalano <diego_catalano_ferraioli at yahoo.com>
- Date: Mon, 18 Mar 2002 23:39:02 -0500 (EST)
- Reply-to: dcatalano at unisa.it
- Sender: owner-wri-mathgroup at wolfram.com
Dear friends!
Look !
---------------------------------------------
In[1]:=
$Version
Out[1]=
"4.0 for Microsoft Windows (April 21, 1999)"
In[2]:=
DSolve[D[u[x, y], x, x] == 0, u[x, y], {x, y}]
First::"first": "\!\({}\) has a length of zero and no
first element."
Out[2]=
\!\({{u[x, y] -> \(-\(\(DSolve`DSolveDump`b$11\
x\^2\)\/2\)\) + \(C[1]\)[
y] + \(C[2]\)[y]}}\)
In[3]:=
DSolve[D[u[x, y], y, y] == 0, u[x, y], {x, y}]
Out[3]=
{{u[x, y] -> C[1][x] + C[2][y]}}
-------------------------------------------------
That is all!
Diego
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