[cfp-interest 3708] Re: compoundn(0,n)

[Fred J. Tydeman]

On Fri, 7 Nov 2025 07:35:32 -0800 Jim Thomas wrote:
>
>This case is specified explicitly in ISO/IEC 60559, and Annex F does include similar cases, e.g.  exp(+/-0) is 1.
>
>Are there other such cases?
>
>Are there exact cases not mentioned in ISO/IEC 60559 because the exactness is implied by correct rounding that should be added to F.10?

pow(x,1) is exactly x
scalbn(x,0) is exactly x     [and scalbln and ldexp]



---
Fred J. Tydeman        Tydeman Consulting
tydeman at tybor.com      Testing, numerics, programming
+1 (702) 608-6093      Vice-chair of INCITS/C (ANSI "C")
Sample C17+FPCE tests: http://www.tybor.com
Savers sleep well, investors eat well, spenders work forever.