Simulating Gas at High Redshift
  We discuss simulations of gas at high redshift. We briefly review the methods used and the results for quasar absorption lines. We present gas mass functions and galaxy correlation functions for 5 different cosmological models. Galaxies should be detectable at redshifts greater than 2 by SKAI, and measurements of the gas mass functions and galaxy correlation functions could be used to discriminate between different cosmological models. 
Neal Katz (UMass - Amherst), Lars Hernquist (UCSC), David H. Weinberg   (Ohio State)