Hyers-Ulam stability of higher-order Cauchy-Euler dynamic equations on   time scales
  We establish the stability of higher-order linear non-homogeneous Cauchy-Euler dynamic equations on time scales in the sense of Hyers and Ulam. That is, if an approximate solution of a higher-order Cauchy-Euler equation exists, then there exists an exact solution to that dynamic equation that is close to the approximate one. 
Douglas R. Anderson
math.CA