Low-Mass Cluster Galaxies: A Cornerstone of Galaxy Evolution
  Low-mass cluster galaxies are the most common galaxy type in the universe and are at a cornerstone of our understanding of galaxy formation, cluster luminosity functions, dark matter and the formation of large scale structure. I describe in this summary recent observational results concerning the properties and likely origins of low-mass galaxies in clusters and the implications of these findings in broader galaxy formation issues. 
Christopher J. Conselice