There are several packages for interval sets. * [IntervalSets.jl](https://github.com/JuliaMath/IntervalSets.jl) * [Intervals.jl](https://github.com/invenia/Intervals.jl) * [IntervalArithmetic.jl](https://github.com/JuliaIntervals/IntervalArithmetic.jl) Related issues * https://github.com/JuliaMath/IntervalSets.jl/issues/67 * https://github.com/invenia/Intervals.jl/issues/94
