[Wien] What is the E-cut

[Chur Allen]

Dear wien users:
   Recently, I read some papaers about the wien calculations. I dont 
understand the E-cut.
It is said to be the size of the basis functions.There are E-cut for s,p,d 
and the E-cut for spin orbit.They range from 0 to 150 ev.My question is what 
is E-cut , how to find it after a  calculation,and how we make use of it? 
Can you give me a explanation?

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