Re: Motion 46: finalise interval literals, amendments

[Ralph Baker Kearfott <rbk5287@xxxxxxxxxxxxx>]

Ned,

Thank you for clarifying.  Actually, by doing that, I think we
could avoid the possible clash of notation if we specified
concrete delimiters.

The user would then rely
on the P-1788 floating-point-to-interval constructor "nums2interval".

Baker

On 06/26/2013 08:33 AM, Ned Nedialkov wrote:
> On 2013-06-26, at 3:25 PM, Ralph Baker Kearfott <rbk5287@xxxxxxxxxxxxx> wrote:
>
> > Ned et al,
> >
> > On 06/25/2013 04:37 PM, Ned Nedialkov wrote:
> > > On 2013-06-23, at 10:21 PM, Jürgen Wolff von Gudenberg <wolff@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> > > > p1788  SHALL prescribe the strings that are valid inputs for text2intval
> > > By text2interval, I would consider only converting a string to an interval, not two strings that represent an
> > > interval to an interval. So, we can assume the same syntax of a string as let's say what C or Fortran assumes.
> I meant take a string that represents one decimal number, e.g. "0.1". Then
> text2interval("0.1") will return the binary interval containing 0.1.
>
> Then leave to the user to convert left and right bounds. This will make it simpler for the standard and
> more flexible for the user.
>
> Regards,
> Ned
> > I\m not sure what you mean here.  How does specifying that
> > we have two text strings corresponding to numbers in a
> > particular programming language or in accepted mathematical
> > notation, separated by a comma and delimited by square
> > brackets, differ from specifying a single text string with
> > components having the same attributes?
> >
> > A second thought:  Does anyone have any qualms about
> > specifying "[" and "]" concretely?  (Those symbols may
> > already have been used in programming languages
> > used to access the standard-conforming implementation.)
> >
> > Best regards,
> >
> > Baker
> >
> > --
> >
> > ---------------------------------------------------------------
> > R. Baker Kearfott,    rbk@xxxxxxxxxxxxx   (337) 482-5346 (fax)
> > (337) 482-5270 (work)                     (337) 993-1827 (home)
> > URL: http://interval.louisiana.edu/kearfott.html
> > Department of Mathematics, University of Louisiana at Lafayette
> > (Room 217 Maxim D. Doucet Hall, 1403 Johnston Street)
> > Box 4-1010, Lafayette, LA 70504-1010, USA
> > ---------------------------------------------------------------


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R. Baker Kearfott,    rbk@xxxxxxxxxxxxx   (337) 482-5346 (fax)
(337) 482-5270 (work)                     (337) 993-1827 (home)
URL: http://interval.louisiana.edu/kearfott.html
Department of Mathematics, University of Louisiana at Lafayette
(Room 217 Maxim D. Doucet Hall, 1403 Johnston Street)
Box 4-1010, Lafayette, LA 70504-1010, USA
---------------------------------------------------------------