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Exchange and correlation and their defernces

 
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Nov22-12, 10:45 AM   #1
 

Exchange and correlation and their defernces


What is the deferences between Exchange and correlation and also what is Exchange-correlation hole?
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Nov23-12, 06:05 AM   #2
 
In fact I want to know that whether sum of the charges of exchange hole and correlation hole is +e (e:electron charge) or each of them has the charge +e so that some of their charges is +2e?
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