Interval
Key Interval in Number Is Inside Fn refers to an array of intervals expressed as a 1D-array of objects of type Real Interval
At least one interval is required.
Given u input variables x₁ , x₂ , ... , xᵤ, the iᵗʰ interval applies to the input variable xᵢ
The last interval applies to all remaining input variables.
The number of intervals is allowed to exceed u, in which case the remaining intervals are simply ignored.
Exceptionally, if Use Mask = true, the first input variable x₁ acts as the mask, which means that in this case the iᵗʰ interval applies to the input variable xᵢ₊₁
More details at Number Is Inside Fn