Hi Gordon,
Could you let me have your programme so I can look into this?
In terms of correctness, though, this is not a bug. The range [1,6..11] which
has length 3 offset 1 and step 5 is equal to the plain list [1,6,11]. GAP
range notation only makes sense with the brackets and the three entry notation
[a,b..c] implies a step of b-a. b..c does not mean anything outside brackets.
As Laurent says, GAP in general, is allowed to, and benefits by being able to,
choose what representation to return a result in, so long as the result is
correct according to the documentation.
If there isn't a good performance reason, though, then this is needless
complication, so I'll look into it.
Steve
On 8 Feb 2013, at 09:10, Gordon Royle <gordon.ro...@uwa.edu.au> wrote:
> I have a simple program that uses SmallestImageSet to find the lex least
> representative of orbits of a graph on k-sets.
>
> The output has suddenly started to look odd, in that in among all the
> "regular" sets, there are sets that print out with a strange syntax
>
>
> [ 1, 5, 51 ]
> [ 1, 6 .. 11 ]
> [ 1, 6, 12 ]
>
> The set [ 1, 6 .. 11 ] is equal to [1, 6, 11] but why does it print this way?
>
> Thanks
>
> Gordon
>
> Professor Gordon Royle
> School of Mathematics and Statistics
> University of Western Australia
> gordon.ro...@uwa.edu.au<mailto:gordon.ro...@uwa.edu.au>
>
>
>
>
>
>
>
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>
>
>
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