find the lowest common denominator

[Joe Horn]

(01-15-2018 12:53 PM)Didier Lachieze Wrote:  I'm not sure there is a build-in function providing the lowest common denominator.

There is: it's the lcm function (lowest common multiple). In CAS, it works on integers of any length.

lcm(12,18) --> 36
1/12+1/18 --> 5/36

It also works on polynomials, not just integers.