content_image/296324.jpg content_image/296323.jpg content_image/296322.jpg content_image/296319.jpg content_image/296318.jpg content_image/296321.jpg content_image/296320.jpg
Using (13), we obtain that 

<img src='content_image/296324.jpg'>

where 

Integrating inequality (14) from t − 1 to t , we get 

<img src='content_image/296323.jpg'>

<img src='content_image/296322.jpg'>

Since z ( t ) is nonincreasing for t > T, from the above inequality, we obtain that 

and so, we have 

Using (15), (8), and (9), we obtain from the above inequality that 

and 

<img src='content_image/296319.jpg'>

<img src='content_image/296318.jpg'>

<img src='content_image/296321.jpg'>

<img src='content_image/296320.jpg'>

