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Question: How to grab a variable

Question:How to grab a variable

lemelinm 1535 Maple
October 01 2008
0

Hi all,

I have the following:

> e1 := {x1(t), x2(t)};

                            e1 := {x1(t), x2(t)}
> op(1, e1);

                                    x1(t)
> op(2, e1);

                                    x2(t)


But I need to grab the independant variable "t".  An idea would be nice.

Thanks

Mario
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