[Wien] GGA+U

[Leonardo Pisani]

Dear  Prof. Cottenier,

I actually wonder whether there is some specific reason why there is no such 
kind of " GGA+U" calculation in the literature but only LDA+U.....is this 
maybe due to the fact that GGA is already an improvement upon LDA and 
therefore LDA+U should take already into account  the feature of GGA alone?

Thank you very much.
Best Regards, 
Leonardo Pisani