Re: [office-formula] Constraints and infix ^

[Patrick Durusau <patrick@durusau.net>]

Andreas,

Andreas J Guelzow wrote:
> On Tue, 2009-01-13 at 11:26 -0500, Patrick Durusau wrote:
>   
>> Greetings!
>>
>> Just a quick note to check my understanding of the "constraint" listing 
>> for each function.
>>
>> Under 6.3.5 Infix Operator "^"
>>
>> Constraints: OR(Left != 0; Right != 0)
>>     
>
> This is the same as:
> not (Left == 0 and Right == 0)
>
> so the only thing prohibited is 0^0. 
> 0^(some non-zero number)  and (some non-zero number)^0 are both allowed.
>
>   
OK, but then the statement:

> Implementations *shall* compute 0^0 as one of 0, 1, or an Error, but 
> it is implementation-defined which of these options is the result.
>
Is incorrect.

According to your reading, we have prohibited 0^0 and then in a 
following paragraph mandated it but don't define the result.

If it is prohibited, there is no valid result. (full stop)

Thanks for the quick response!

Hope you are having a great day!

Patrick

-- 
Patrick Durusau
patrick@durusau.net
Chair, V1 - US TAG to JTC 1/SC 34
Convener, JTC 1/SC 34/WG 3 (Topic Maps)
Editor, OpenDocument Format TC (OASIS), Project Editor ISO/IEC 26300
Co-Editor, ISO/IEC 13250-1, 13250-5 (Topic Maps)