On Mon, Oct 06, 2008 at 06:26:11PM -0400, Alan Bromborsky wrote:
> Yes almost, but can you suppress the (x1,x2,x3) in the output so that
> the output would be
>
> A*dB/dx1+B*dA/dx1 ?
I dont think that
dA/dx1
is a good idea for a CAS. This notation means the partial derivative of
A(x1, x2, x3) in respect to x1. But x1 is only a 'local symbol' in the
function A. The following terms are equivalent
diff( A(x1, x2, x3), x1) == diff( A(b, c, e), b)
== diff( A(x, y, z), x)
Thats why there is an other notation
diff(A, 1)
means the partial derivative of A in respect to the first Argument of A.
This notation it unique but not so convinient to read.
By,
Friedrich
PS.: What is your original problem?
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