*Another important aspect of such cosmologies is highly abstract concept of [[spatial curvature]] allowing relativistic theorists to make assumption of homogeneity thus to adopt [[Riemannian geometry]] which operates in curved space. | *Another important aspect of such cosmologies is highly abstract concept of [[spatial curvature]] allowing relativistic theorists to make assumption of homogeneity thus to adopt [[Riemannian geometry]] which operates in curved space. |