LREAL

LREAL = .TRUE. | .FALSE. | On (or O) | Auto (or A)
Default: LREAL = .FALSE. 

Description: LREAL determines whether the projection operators are evaluated in real-space or in reciprocal space.

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LREAL=.FALSE.	projection done in reciprocal space
LREAL=.TRUE.	projection done in real space, (old, superseded by LREAL=O)
LREAL=On or O	projection done in real space, projection operators are re-optimized
LREAL=Auto or A	projection done in real space, fully automatic optimization of projection operators (no user interference required)

The non local part of the pseudopotential requires the evaluation of an expression:

$\sum _{ij}D_{ij}|\beta _{j}\rangle \langle \beta _{i}|\psi _{n\mathbf {k} }\rangle$.

where the "projected wavefunction character" is defined as:

$C_{in\mathbf {k} }=\langle \beta _{i}|\psi _{n\mathbf {k} }\rangle =$

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