Hi

I would like to work with sets that are real intervals or combinations
of them : mainly intersection and union.
Example :
[0,1] intersection with [0.5 , pi]

Using the Sage Reference Manual 4.1.1, I was able to do that :

sage:A=Set(RealField())
sage: sqrt(2) in A
True

So it is possible to consider parts of R as sets. How can I build an
interval ?

Have a good day
Laurent Claessens

PS : I send this message by email on December, 4. Since I did not even
saw my message appearing, I decided to repost it from the GoogleGroup
online interface. I'm wrong in doing that ?

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