Abstract:
The one-electron reduced local energy function, t ~ , is
introduced and has the property < tL)=(~>. It is suggested that the
accuracy of SL reflects the local accuracy of an approximate wavefunction.
We establish that <~~>~ <~2,> and present a bound formula, E~ ,
which is such that
where Ew is Weinstein's lower bound formula to the ground state. The
nature of the bound is not guaranteed but for sufficiently accurate
wavefunctions it will yield a lower bound.
,-+ 1'S I I Applications to X LW Hz. and ne are presented.