Hi Burcin,

As Dana Ernst has now mentioned on the ticket, this an outgrowth of
the professional development workshop that Jason Grout, Karl-Dieter
Crisman and myself have been running this summer on Sage through the
Mathematical Association of America.  Dana is one of our top
students.  ;-)  But seriously, he is interested in contributing to
Sage and I've been helping him along with the process.

Another one of the "students" (faculty at mostly undergraduate
colleges) wondered about why these keywords were not present (I think
they may be in some other of the M's, but obviously not Maple, and I
can't recall exactly).  So we all suggested they could be added, and
Dana took the bait.

So three developers thought this would be useful in their teaching.
Which is not to say it shouldn't be discussed here in the open.  I'm
all for avoiding clutter, but also thought these keywords would be
valuable (and IMHO opinion, preferable to "above" and "below" when we
tend to draw the axis for the domain horizontally!).

Thanks for bringing the discussion here.

Rob

On Jul 24, 2:30 pm, Burcin Erocal <bur...@erocal.org> wrote:
> Hi,
>
> Trac #9200 [1] adds new keywords from_left and from_right to the top
> level limit() function. We already have above, below, minus, plus as
> keywords. I wonder if a new one is necessary, and if it should be
> "from_left/from_right".
>
> [1]http://trac.sagemath.org/sage_trac/ticket/9200
>
> For reference, Maple only support 4 keywords [2], left, right, real,
> complex.
>
> [2]http://www.maplesoft.com/support/help/Maple/view.aspx?path=limit
>
> IMHO, we should also try to keep the interface simple, and not clutter
> things up by supporting many different ways of doing the same thing.
>
> Any comments?
>
> Cheers,
> Burcin

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