Variational method (1)Construct a wave function p(C1,C2,00,C (2 )Calculate the energy of o E6≡E6(C1C2。cn) ()Choose c,(i-1, 2, .ee, m) so that eo is minimum(1) Construct a wave function f(c1 ,c2 , •••,cm ) (2) Calculate the energy of f: Ef  Ef (c1 ,c2 , •••,cm ) (3) Choose {cj *} (i=1,2,•••,m) so that Ef is minimum Variational Method