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Topic: list and seq with maple and mupad
Replies: 2   Last Post: Oct 9, 1996 3:58 AM

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Maltey UPS

Posts: 3
Registered: 12/8/04
list and seq with maple and mupad
Posted: Oct 8, 1996 12:27 PM
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Hello,

In mathematical science, I know vector, matrix, set, list (or p-uple).
In mupad and maple these types are OK.

In a mathematical problem I write transformations as
[u1, u2, ... un] <<>> [u0, u1, ... un]
This is a basic transformation.

I can't do this with mupad and maple without a sequence.
I think it's "stupid" to use a sequence because it's an other type
I think it's difficult to explain to a student what a sequence is
(a list without brackets) and it's not very serious.

In LISP there are functions as cons, car, cdr, append.
In mupad and maple I only find list[1] for the car function.
in the others cases I must use sequence.

I don't want to use many many sequences because in math a result
without parenthesis or so isn't very serious.
So 1,2,3,4 (a sequence) is only one mathematical objet or four
But there is no problem with [1,2,3,4] : it's a 4-uple.

And now a dream and a question !

My dream : I want easy primitive functions on list

My question : Is there a serious reason that seq are so necessery
in computation with maple and mupad...

If you have any idea...

Excuse my poor english : Francois.Maltey@enst-bretagne.fr







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