I am not sure. If this is the situation

then isn't the union case this

but the intersect case this

Maybe the latter should rather be called as "intersection".

@idanmiara can you check this proposed change ? (I'm not sure it is. the current description seems consistent with the behaviour I'd expect from the naming of the options)

The functions work as expected. And their description is also actually right.
Apologies for this. The words minimal and maximal led me to a wrong interpretation while not reading it too carefully.
Closing PR

The functions work as expected. And their description is also actually right. Apologies for this. The words minimal and maximal led me to a wrong interpretation while not reading it too carefully. Closing PR

Yes, correct. But I see your point. Do you want to rephrase the definition?

TBH, I think the current phrasing is fine.