WhatAlgebraic Relation Calculator implemented in ruby thanks to Treetop

> A = {(0,1),(2,3)}
> B = {(0,1),(1,2)}
> A+B # union {(0,1),(1,2),(2,3)}
> A/B # intersection {(0,1)}Installationgem install treetop -y svn checkout http://rel.googlecode.com/svn/trunk/ rel cd rel ruby main.rb