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Using as a model the Hubbard Hamiltonian we determine various basicproperties of electron-doped cuprate superconductors like${Nd}_{2-x}{Ce}_{x}{CuO}_{4}$ and ${Pr}_{2-x}{Ce}_{x}{CuO}_{4}$ for aspin-fluctuation-induced pairing mechanism. Most importantly we find a narrowrange of superconductivity and like for hole-doped cuprates $d_{x^{2}-y^{2}}$ -symmetry for the superconducting order parameter. The superconductingtransition temperatures $T_{c}(x)$ for various electron doping concentrations$x$ are calculated to be much smaller than for hole-doped cuprates due to thedifferent Fermi surface and a flat band well below the Fermi level. Latticedisorder may sensitively distort the symmetry $d_{x^{2}-y^{2}}$ viaelectron-phonon interaction

Theory for electron-doped cuprate superconductors:d-wave symmetry order parameter