Re: [sage-devel] Non-negative integer vectors

Thu, 28 Sep 2017 22:48:11 -0700 

Good question :-)

On 28/09/2017 20:00, Ursula Whitcher wrote:

Yes, that looks like exactly the functionality I wanted!

Why doesn't the documentation at

http://doc.sagemath.org/html/en/reference/combinat/sage/combinat/integer_vector.html

link to the documentation for integer lists?

--Ursula.

On Thursday, September 28, 2017 at 10:27:14 AM UTC-4, vdelecroix wrote:


Do you mean

sage: IntegerListsLex(length=2, min_sum=0, max_sum=5).list()
[[5, 0],
   [4, 1],
   [4, 0],
   [3, 2],
   [3, 1],
   [3, 0],
   [2, 3],
   [2, 2],
   [2, 1],
   [2, 0],
   [1, 4],
   [1, 3],
   [1, 2],
   [1, 1],
   [1, 0],
   [0, 5],
   [0, 4],
   [0, 3],
   [0, 2],
   [0, 1],
   [0, 0]]

On 28/09/2017 15:55, [email protected] <javascript:> wrote:

In preparation for Sage Days 91, I'm looking at the thesis of Malcolm

Kotok

(as in https://trac.sagemath.org/ticket/19865 ). That thesis

incorporates a

class to list all non-negative integer vectors of a fixed length with

sum

less than n.

I see that we already have an IntegerVectors class for non-negative

integer

vectors with sum exactly n:



http://doc.sagemath.org/html/en/reference/combinat/sage/combinat/integer_vector.html


Would it be useful to expand that class to list vectors with sum at most

n?

If so, what should the input parameters look like?

--Ursula Whitcher.







--
You received this message because you are subscribed to the Google Groups 
"sage-devel" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to [email protected].
To post to this group, send email to [email protected].
Visit this group at https://groups.google.com/group/sage-devel.
For more options, visit https://groups.google.com/d/optout.

Reply via email to