On Sunday, July 26, 2015 at 9:09:19 AM UTC-4, Tom Breloff wrote: > > For example, I have a specialized solution to represent financial prices > which have a fixed accuracy, but I want to be able to do floating point > arithmetic on them.
Why not use decimal floating-point for that? Regarding, unums, without hardware support, at first glance they don't sound practical compared to the present alternatives (hardware or software fixed-precision float types, or arbitrary precision if you need it). And the "ubox" method for error analysis, even if it overcomes the problems of interval arithmetic as claimed, sounds too expensive to use on anything except for the smallest-scale problems because of the large number of boxes that you seem to need for each value whose error is being tracked.
