Code and data for: Turning points and finite-time edges in homogeneous vacuum gravity from entropy

Code and data supporting the article "Turning points and finite-time edges in homogeneous vacuum gravity from entropy" by F. Milani. The archive contains: the closed-form FLRW equations of the exact trace-logarithmic gravity-from-entropy action and a Hamiltonian integrator; symbolic and interval-arithmetic checks (turning-point theorem, two independent interval enclosures of the invariant-region constants for the two-form edge, de Sitter checks, amplitude relations, dependence of the local exponent on a0, a1); generators of all numerical data used in the paper; the stored outputs (JSON); plotting scripts for Figs. 1–4; and the explicit expression of the function G. All scripts were re-executed and reproduced the stored outputs; see README.md. Requirements: Python 3, sympy, mpmath, numpy, scipy, matplotlib, python-flint.