2 papers
gr-qc2025
The hidden truth of ideal relativistic fluids: the matter Lagrangian is its total energy density, not its pressure!
Sergio Mendoza, Sarahí Silva
It has been established in the literature that the matter Lagrangian of an ideal fluid can be expressed either as its total energy density or as its pressure. In this work, we demo…
gr-qc2023
The matter Lagrangian of a non-perfect fluid
Sergio Mendoza, Sarahi Silva
We show that the matter Lagrangian of a non-perfect fluid takes the negative or positive value of the total energy density of the fluid, which is composed of the the rest plus inte…