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Topic: Relational operators on intervals: bug?
Replies: 21   Last Post: Nov 17, 2012 3:51 AM

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Andrzej Kozlowski

Posts: 226
Registered: 1/29/05
Re: Relational operators on intervals: bug?
Posted: Nov 15, 2012 4:04 AM
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On 14 Nov 2012, at 07:28, Richard Fateman <fateman@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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