Sr2CuO2Cl2. represents a virtually perfect case of the two-D antiferromagnetic CuO2-plane and thus is of particular desire during the context of the origins of large TC superconductivity. Now we have calculated experimentally and analyzed theoretically the Ti 2p X-ray photoemission spectra (XPS) and the resonant enhancement of valence photoemissionat the https://okada4dsg.com/