# The stifness of the supranuclear equation of state (once again)

## TL;DR

This paper reviews the current understanding of the stiffness of supranuclear equations of state, focusing on hyperons, quark matter transition, and implications for massive compact star observations.

## Contribution

It provides a comprehensive reassessment of the factors influencing the stiffness of supranuclear matter and its impact on astrophysical observations.

## Key findings

- Hyperons tend to soften the equation of state.
- Transition to quark matter can increase stiffness under certain conditions.
- Massive star observations constrain the equation of state models.

## Abstract

We revisit the present status of the stiffness of the supranuclear equations of state, particularly the solutions that increase the stiffness in the presence of hyperons, the putative transition to a quark matter phase and the robustness of massive compact star observations.