 Secondly we study in detail Azema-Yor martingales defined from a non-negative local martingale converging to zero at infinity.
<clarity>  Secondly we study in detail Azema-Yor martingales defined from a non-negative local martingale converging to zero at infinity.
 We investigate in detail Az\'ema-Yor martingales defined from a non-negative local martingale converging to zero at infinity.