The luminosity function in the solar neighbourhood

van Rhijn’s method is used to derive the luminosity function in the solar neighbourhood from large proper motion stars. The values obtained are smaller than the currently accepted ones; for M_B < 9, the factor is of the order of two. It is shown that these differences arise from the systematic errors of other methods, specially for non-inclusion of the correction for the errors of the parallaxes. The luminosity function has some irregularities, not previously found because of smoothing. A secondary maximum near M_B = 11 , particularly, seems to be a real feature.Asociación Argentina de Astronomí