SEARCH Articles Figures Tables Beck-Perdew functional Becke-Perdew Becke-Perdew functional Becke-Perdew functional, hydrogen Density functionals Perdew-86 functional Density functionals Perdew-Wang-91 exchange-correlation Generalized gradient approximation Perdew Levy—Perdew relationship PW91 (Perdew-Wang Perdew - Burke - Emzerhof Perdew - Burke - Emzerhof functional Perdew Burke Ernzerhof Perdew Burke Ernzerhof functional Perdew Wang 91 functional Perdew and Wang Perdew and Zunger Perdew, Burke, Ernzerhof method Perdew, John Perdew-86 functional Perdew-Becke-Ernzerhof Perdew-Burke-Ernzerhof basis sets Perdew-Burke-Ernzerhof density Perdew-Burke-Ernzerhof density functional theories Perdew-Burke-Ernzerhofer Perdew-Kurth-Zupan-Blaha Perdew-Kurth-Zupan-Blaha functional Perdew-Wang Perdew-Wang 1991 generalized-gradient Perdew-Wang 1991 generalized-gradient approximation Perdew-Wang 91 generalized Perdew-Wang approach Perdew-Wang correlation functional Perdew-Wang correlation functionals Perdew-Wang exchange functional Perdew-Wang formula Perdew-Wang scheme Perdew-Wang-91 exchange-correlation Perdew-Wang-91 exchange-correlation functional Perdew-Zunger scheme Perdew-Zunger self-interaction Perdew-Zunger self-interaction correction Tao Perdew Staroverov Scuseria