Here's another naive beginner question . . .
I have a problem which requires checking (something) for every
element of a vector space. The code . . .
for v in Elements(RowSpace(field,generators)) do
works fine *except* it requires building a list of all elements
of the vector space first. (When the field or dimension is moderately
large, there is insufficent space to save the entire list.)
I tried instead several ways to iterate elements of the vector space
for a in field for b in field for c in field for d in field v = [a,b,c,d]; (something) od; od; od; od;
for i in [1..Size(field)^dimension] do
v := fieldelement(i)
where "fieldelement" turned i into a vector like
[1,2,2,5] and produced the vector consisting of the
first, second, second and fifth field elements.
None of my attempts have been very satisfactory. I tested things
using a six-dimensional field over GF(7). Gap was barely able
store the elemetns of the field and (something) took about 12 seconds
to run on all vectors. With every iteration method I could think
of, Gap took considerably more than 2 minutes to run through the
list of vectors.
My question: Is there a quick way to iterate the elements of
a vector space or to ask Gap for the elements without gap having
to compute them all first?
--Walter _____________________________________________________________________________ Walter C3arlip **** firstname.lastname@example.org **** (the "3" is silent) **** email@example.com **** _____________________________________________________________________________