Re: Rational[a,b] vs Rational[1,2]

*To*: mathgroup at smc.vnet.net*Subject*: [mg116630] Re: Rational[a,b] vs Rational[1,2]*From*: Richard Fateman <fateman at eecs.berkeley.edu>*Date*: Tue, 22 Feb 2011 04:43:04 -0500 (EST)

On 2/21/2011 6:26 PM, DrMajorBob wrote: > I think Mathematica expects us to create rationals in the usual way... > by dividing integers. When we do, Mathematica removes common factors > and can end up with an Integer, a Rational, Indeterminate, or > ComplexInfinity. > > If you try another method... good luck! A simple solution is to define Rational[a_,b_] := a/b /; Or[Not[IntegerQ[a],IntegerQ[b]] wouldn't you agree? RJF