Ergodicityof N-continuedfractionexpansions

Abstract

Recently,EdwardBurgerandhisco-authorsintroducedandstudied in Burgeretal.(2008) [3] a newclassofcontinuedfraction algorithms.Inparticulartheyshowedthatforeveryquadratic irrationalnumber x thereexistinfinitelymanyeventuallyperiodic N-expansionswithperiod-length1;seealsoKomatsu(2009) [10] forrelatedproperties.In2011,MaxwellAnselmandSteven Weintraubfurtherstudiedthepropertiesof N-expansionsin Anselm andWeintraub(2011) [2]. Oneniceresulttheyobtainedis that every x between0and N has uncountablymany N-expansions for eachinteger N 2. Inthispaperwewillreprovethisresultand fromthiswestudytheergodicpropertiesofvarioussubclassesof N-expansions.

Keywords

Continued fractions, Ergodicity, σ-Finite, infinite invariant measure

Citation

Dajani, K, Kraaikamp, C & van der Wekken, N 2013, 'Ergodicityof N-continuedfractionexpansions', Journal of Number Theory, vol. 133, no. 9, pp. 3183-3204. https://doi.org/10.1016/j.jnt.2013.02.017