Q: Interval representations + rounding modes

*To*: mathgroup at smc.vnet.net*Subject*: [mg8805] Q: Interval representations + rounding modes*From*: sbecuwe at uia.ua.ac.be (Stefan.Becuwe)*Date*: Fri, 26 Sep 1997 00:33:32 -0400*Sender*: owner-wri-mathgroup at wolfram.com

Is there an (easy) way to give the interval representation of a (rational) number, i.e. without typing N[rational_number, 50] or something like that, i.e. [round-to-min-infinity(rational_number), round-to-plus-infinity(number)]? There is a function Interval[], but it's not specified how the end-points of the interval are defined... Do there exist functions round-to-minus-infinity -plus-infinity -to-zero -to-nearest Stefan Becuwe