The degree of generality of inflation in FRW models with massive scalar field and hydrodynamical matter (Q1576106)

The Friedmann-Robertson-Walker cosmological models with a massive scalar field are studied in the presence of hydrodynamical matter in the form of a perfect fluid. The configuration space \((a,\varphi)\) is used to illustrate the generality of the inflation problem. The presence of a perfect fluid with \(0\leq r\leq 1\) in the universe filled by a massive scalar field can enlarge the fraction of non-inflationary trajectories, but this fraction cannot exceed 60\%, by contrast to \(30\%\) in models without fluid.