Pairing Symmetry, Spin-Gap and more in HTSC Cuprates

This work is based on the double correlated linear aggregations of holes in checkerboard geometry. It is proved that the pairing function symmetry is - d(xx-yy), as been observed experimentally. It is also shown that there is a “superconductive spin gap” for the observation of the magnetic incommensurate modulation peaks, in agreement with experiment. In addition, the unperturbed Hamiltonian is reanalyzed and modified.