On 4/10/07, van Nek <van.nek at arcor.de> wrote:
>
> For expressions which only use the basic operations +,-,*,/ and ^
> (polynomial expressions)
> the result is the same, due to the definition of arithmetrics with lists,
> ...
>
Yes, when listarith is true (the default).
And there is another interesting case...:
x . x, x=[1, 2, 3], listarith:true => 14
vs.
x . x, x=[1, 2, 3], listarith:false => [1, 2, 3]^^2
vs.
map( lambda([x], x . x), [1, 2, 3] ) => [1, 4, 9]
Weirdly,
x^^2, x=[1, 2, 3], listarith:true => [ 14 ]
(surely a bug)
More fun...
x^^2,x=[[1,2],[3,4]],listarith:false => [[1,2],[3,4]]^^2
x^^2,x=[[1,2],[3,4]],listarith:true => matrix([[10,20]])
map(lambda([x],x^^2),[[1,2],[3,4]]),listarith:false => [[1,2]^^2,[3,4]^^2]
map(lambda([x],x^^2),[[1,2],[3,4]]),listarith:true =>
[matrix([5]),matrix([25])]
-s