Re: The current proposal
Arnold et al,
Please see my inserted comments.
Baker
On 2/23/2009 11:22 AM, Arnold Neumaier wrote:
Siegfried M. Rump schrieb:
(1) For a given function F, for example, X=F(interval(A.sup)) should
give an
inclusion of the value of F at the right bound of A.
Always???
This value is not even properly defined in many cases,
such as when F(x)=x-x or F(x)=(x-1)/(x+1) and A=[0,inf].
Have we already discredited Cset arithmetic? The values
are clearly defined in that system, regardless of whether
or not we consider infinity to be a member of the set
of numbers.
.
.
.
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R. Baker Kearfott, rbk@xxxxxxxxxxxxx (337) 482-5346 (fax)
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URL: http://interval.louisiana.edu/kearfott.html
Department of Mathematics, University of Louisiana at Lafayette
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