The K Band Luminosity Functions of Galaxies in High Redshift Clusters
  K band luminosity functions (LFs) of three, massive, high redshift clusters of galaxies are presented. The evolution of K*, the characteristic magnitude of the LF, is consistent with purely passive evolution, and a redshift of forma tion z = 1.5-2. 
S.C. Ellis (1) and L.R. Jones (2) ((1) AAO, (2) Univ. of Birmingham,   UK)