On Sep 17, 2009, at 10:44 PM, Robert Bradshaw wrote: > On Sep 17, 2009, at 3:16 PM, David Harvey wrote: > >> I disagree with this change. One of the main purposes of interval >> arithmetic is to be able to take a function f(x) that operates on >> floats, and pass in intervals instead, to determine the possible >> range >> of outputs a given input interval could produce. This change violates >> that paradigm. The author of f(x) shouldn't need to care whether they >> are operating on floats or intervals. > > +1. The smallest possible value for floor is a different thing (and > contains less information) than all possible values of floor, and > "all possible values" characterizes the interval arithmetic > operations.
Example: sage: floor(log(RIF(8)) / log(RIF(2))) 3.? Should this be 2? What if it returned an Integer if there was a unique floor (ceiling, etc.) and raised an exception otherwise? - Robert --~--~---------~--~----~------------~-------~--~----~ To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
