On 2011-04-07 10:54, Simon King wrote:
> By the way, *should* |-5| be supported in Sage? Via preparsing?
Looks hard to do in a good way, because a parser cannot see the
difference between a left and right |.
--
To post to this group, send an email to sage-devel@googlegroups.com
To unsubscribe fr
On 7 Apr., 10:43, javier wrote:
> ... And in any case
> the use of the determinant is completely out of context.
+1.
There is one reason why one could think that the determinant should be
related with the absolute value: Both are often (at least in my
experience) denoted by vertical lines: |-5|
If one thinks of "absolute value" as in the metric sense of "norm"
then indeed the determinant makes no sense. Some valid norms for a
matrix would be:
* The maximum of the absolute values of its entries (supremum norm)
* The root of the sum of the squares of all entries (2-norm)
* The maximum of th
On Apr 7, 5:04 am, Rob Beezer wrote:
> ... is the determinant? Does this make sense to anyone? Am I missing
> something? I can't think of a reason why, and the documentation
> (sage.matrix.matrix2.Matrix._abs_) does not shed any extra light on
> the reason.
>
> This came up on sage-support
>
>
