Thread Links | Date Links | ||||
---|---|---|---|---|---|
Thread Prev | Thread Next | Thread Index | Date Prev | Date Next | Date Index |
Arnold Neumaier wrote:
R. Baker Kearfott schrieb:Arnold Neumaier wrote:
. . .
I don't think that the floating-point number 2 is derived from a set of real numbers near 2.
Huh? Certain exact (perhaps irrational numbers) are rounded to 2. That's what I was saying, no more and no less. . . .
Member opinion statement: In the former case, I don't see how we can know what it should beother than the singleton interval both of whose end points are the correspondingfloating point number. In this regard, I am sympathetic with Siegfried'sstatement that the only thing that can be done is user education. (Siegfried,am I "quoting" you accurately?)The question here is which stand you take as a Member when in place of 0.1 you have 1e308 or 1e309. These are converted into a finite float f and an infinite float, respectively. In the first case,your argument extends to return [f,f]; in the second, to return [inf,inf]=Empty. This is my proposal, at least.
True. Within the structure of your proposal, that case should probably be considered separately. 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 ---------------------------------------------------------------