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Re: Relational operators on intervals: bug?


On 14 Nov 2012, at 07:28, Richard Fateman <fateman at cs.berkeley.edu> wrote:

> On 11/12/2012 9:13 PM, Murray Eisenberg wrote:
> 
>> 
>> Here is the empty interval in Mathematica:
>> 
>>   Interval[{1, 0}]
>> 
>> Indeed:
>> 
>>    Resolve[Exists[x, IntervalMemberQ[Interval[{1, 0}], x]]]
>> False
>> 
> Apparently this doesn't mean what you think it does. It gives the same 
> answer for Interval[{0,1}].

Of course that is because 

IntervalMemberQ[Interval[{0, 1}], x]

False

Andrzej Kozlowski



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