ABSTRACT The discovery that neutrinos have mass has important consequences for cosmology. main effect of massive is to suppress the growth cosmic structure on small scales. Such can be accurately modelled using cosmological N-body simulations, but doing so requires accurate initial conditions (ICs). There a trade-off, especially with first-order ICs, between truncation errors late starts and di...

Solutions to hydrodynamic equations, which are used for a vast variety of physical problems, assumed be specified by boundary conditions and initial on the variables only. Initial values other irrelevant description. We show that this assumption is not correct because existence long-time-tail effects ubiquitous in systems governed equations. illustrate breakdown description means simple example...

We present first results from a novel numerical relativity code based on tetrad formulation of the Einstein-scalar field equations combined with recently introduced gauge/frame invariant diagnostics. The provide support for argument that inflation does not solve homogeneity and isotropy problem beginning generic initial conditions following big bang.