A thermodynamic classification of pairs of real numbers via the Triangle   Multi-dimensional continued fraction
  A new classification scheme for pairs of real numbers is given, generalizing earlier work of the author that used continued fraction, which in turn was motivated by ideas from statistical mechanics in general and work of Knauf and Fiala and Kleban in particular. Critical for this classification are the number theoretic and geometric properties of the triangle map, a type of multi-dimensional continued fraction. 
Thomas Garrity
math.NT math-ph math.MP