Central, standard, and Christoffel words are three strongly interrelated classes
of binary finite words which represent a finite counterpart to characteristic
Sturmian words. A natural arithmetization of the theory is obtained by
representing …
In this note we present some results on the Calkin-Wilf tree of irreducible
fractions, giving an insight on the duality relating it to the Stern-Brocot
tree, and proving noncommutative versions of known results relating labels of
the Calkin Wilf …