On 06/06/2007 02:23 PM, Martin Rubey wrote:
Dear Ralf,
Why? The reason is the ::Boolean. That leads to a type mismatch. You
effectively ask for a function with the signature
map: (L -> Boolean, L) -> List Boolean
(where L ==> List Equation Polynomial Integer.) I think you meant to write
map: (Equation Polynomial Integer -> Boolean, L) -> List Boolean
but Axiom does not provide such a function.
In case the above was indeed a typo, this is not true, ListFunctions2 has such
a map:
(1) -> )sh ListFunctions2
ListFunctions2(A: Type,B: Type) is a package constructor
Abbreviation for ListFunctions2 is LIST2
This constructor is exposed in this frame.
Issue )edit /users/rubey/axiom/target/i686-pc-linux//../../src/algebra/LIST2.spad to see algebra source code for LIST2
------------------------------- Operations --------------------------------
map : ((A -> B),List A) -> List B
reduce : (((A,B) -> B),List A,B) -> B
scan : (((A,B) -> B),List A,B) -> List B
Thanks, I've reverted my comment.
The only thing I would say is that FiniteLinearAggregateFunctions2 where
map is finally implemented looks much more complicated than just writing
[beta a for a in la]
instead of
map(beta, la).
Ralf
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