New families of singularity-free cosmological models

TL;DR

This paper extends existing geodesically complete $G_{2}$ stiff fluid cosmological models to include non-orthogonal fluid velocities, broadening the class of singularity-free cosmological solutions.

Contribution

It introduces a new family of singularity-free cosmological models with non-orthogonal fluid velocities, expanding the scope of previous geodesically complete solutions.

Findings

Extended $G_{2}$ models to non-orthogonal velocities.

Maintained geodesic completeness in new models.

Broadened understanding of singularity-free cosmologies.

Abstract

In this talk we extend a family of geodesically complete $G_{2}$ stiff fluid cosmological models to the case in which the velocity of the fluid is not orthogonal to the gradient of the transitivity surface element.