On Fri, Dec 14, 2018 at 8:04 PM Per Bothner <xxxxxx@bothner.com> wrote:
 
A "range" is a sequence - it can be treated as a space-optimized immutable vector.
(In contrast an "interval" is a set - there is no inherent order.)

I would say that an interval has order; what it doesn't have is enumerable elements.

-- 
John Cowan          http://vrici.lojban.org/~cowan        xxxxxx@ccil.org
There is / One art / No more / No less
To do / All things / With art- / -Lessness          --Piet Hein