A probability measure for FLRW models

We use Jaynes' principle to find new probability measures for ensembles of open and closed dust-FLRW models and generalize the results to a gamma-equation of state. For big-bang solutions the measures are non-integrable at Omega(0) = 1 and Omega(0) = infinity. Together with additional restrictions on the possible values of the cosmological constant Lambda, these measures can solve the flatness problem.