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EVENONLY = .TRUE. | .FALSE.
Default: EVENONLY = .FALSE.
Description: EVENONLY=.TRUE. selects a subset of k-points for the representation of the Fock exchange potential, with C1=C2=C3=1, and n1+n2+n3 even.
where b1,2,3 are the reciprocal lattice vectors of the primitive cell, and Ci is the integer grid reduction factor along reciprocal lattice direction bi.
EVENONLY=.TRUE. selects a subset of k-points with C1=C2=C3=1, and n1+n2+n3 even. It reduces the computational work load for HF type calculations by a factor two, but is only sensible for high symmetry cases (such as sc, fcc or bcc cells).