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Re: Curl and Div problems

• To: mathgroup at smc.vnet.net
• Subject: [mg115514] Re: Curl and Div problems
• From: Peter Pein <petsie at dordos.net>
• Date: Thu, 13 Jan 2011 03:26:58 -0500 (EST)
• References: <igjr0p$928$1@smc.vnet.net>

On 12.01.2011 10:07, sean k wrote:
> I'm having problems with VectorAnalysis package.
>
> Within the documentation center, the package loads and works fine.
>
> But in a notebook, it seems to highlight Curl in red and neither Div
> or Curl works properly.
>
...
Hi Sean,

http://reference.wolfram.com/mathematica/VectorAnalysis/tutorial/VectorAnalysis.html

In[1]:= Needs["VectorAnalysis`"]
SetCoordinates[Cartesian[x, y, z]];
{D[x^2 y, x] + D[x z, y] + D[x^2 y^3, z]}
Div[{x^2 y, x z, x^2 y^3}]

Out[3]= {2 x y}

Out[4]= 2 x y

In[5]:= Curl[{x^2 y, x z, x^2 y^3}]

Out[5]= {-x + 3 x^2 y^2, -2 x y^3, -x^2 + z}

Peter