content_image/365726.jpg content_image/365727.jpg content_image/365728.jpg content_image/365729.jpg
Point ξ = x 

The important limiting case in which the expressions (28), (29) are reduced to much simpler forms is the point x = ξ . 

<img src='content_image/365726.jpg'>

Point ξ = 1 

Another notable limiting case is ξ = 1: 

<img src='content_image/365727.jpg'>

and 

Forward limit and G ( E,M ) 0 ( x, t ) 

<img src='content_image/365728.jpg'>

Let us introduce the convenient notations for the combinations of the t -dependent parton densities to which GPDs H g ( E,M ) are reduced in the limit ξ → 0: 

<img src='content_image/365729.jpg'>

