Hello,
I would like to know if it is possible to work with sets.

A second question. Is the a way to do something like   intersection([1 ; 
2];[1.5 ; 5])   and   union([1 ; 2];[1.5 ; 5])   where [a ; b]:={x | 
a<=x<=b}?

Best regards.
Christophe

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