# Anisotropic cosmological dynamics in $f(T)$ gravity in the presence of a perfect fluid

## TL;DR

This paper investigates how anisotropic cosmological models in $f(T)$ gravity evolve with different matter contents, revealing new singularity behaviors and multiple evolution scenarios through numerical analysis.

## Contribution

It introduces a detailed analysis of anisotropic $f(T)$ gravity with perfect fluid, identifying new singularity types and evolution scenarios not present in general relativity.

## Key findings

- Matter content influences the nature of cosmological singularities.
- New anisotropic and isotropic regimes can replace Kasner solutions.
- Six distinct evolution scenarios are numerically identified.

## Abstract

We consider the cosmological evolution of a flat anisotropic Universe in $f(T)$ gravity in the presence of a perfect fluid. It is shown that the matter content of the Universe has a significant impact of the nature of a cosmological singularity in the model studied. Depending on the parameters of the $f(T)$ function and the equation of state of the perfect fluid in question the well-known Kasner regime of general relativity can be replaced by a new anisotropic solution, or by an isotropic regime, or the cosmological singularity changes its nature to a non-standard one with a finite values of Hubble parameters. Six possible scenarios of the cosmological evolution for the model studied have been found numerically.