2-C Z 



K — 



C+h h 





/: 

 /. 

 / 

 / 



/ 

 / 

 / 



a«0 



<r» 



Figure 2.1. Vertical stretching of the coordinates. 



o.r 



r 





I I I I I I I I I I I |-r 



Figure 2.2. Lateral stretching of the coordinates. 



30 



