On Wed, Feb 04, 2009 at 07:12:54AM -0800, chu-ching huang wrote:
>
> Hi,
>
> Maybe this had been discussed:
>
> how to define a sequence of variables (by symbols), {x_1,x_2,---,x_n}
> in case n is also a variable?
Do you want this:
In [1]: var('x_1 x_2 x_n')
Out[1]: (x_1, x_2, x_n)
In [2]: x_1 + x_2 + x_n
Out[2]: x_1 + x_2 + x_n
By,
Friedrich
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