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We present the r-band luminosity function for a sample of 18, 678 galaxies, with average redshift z = 0. 1, from the Las Campanas Redshift Survey (LCRS). The luminosity function may be fitted by a Schechter function with M^*^ = -20. 29+/-0. 02+5 log h, α = -0. 70+/-0. 05 and φ^*^ = 0. 019+/-0. 001 h³^ Mpc^-3^, for absolute magnitudes -23. 0 lambda_ = 5 A as the dividing line, we find significant differences in the luminosity functions of emission and nonemission galaxies, particularly in their α values; emission galaxies have Schechter parameters M^*^ = -20. 03 +/- 0. 03 + 5 log h and α = -0. 9 +/- 0. 1, while non-emission galaxies are described by M^*^ = -20. 22 +/- 0. 02 + 5 log h and α = -0. 3 +/- 0. 1. The average O II λ3727 equivalent widths do not change significantly with redshift, consistent with a star formation rate that stays constant over the depths sampled by the LCRS. This result holds for galaxies of different luminosities and over the respective redshift ranges that these galaxies may be observed, in particular up to about z = 0. 2 for galaxies brighter than M^*^.
Lin et al. (Sat,) studied this question.