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A python-based implementation of the General Relativistic Entropic Acceleration (GREA) theory

• Based on: Calderon et al - 2026 (DESI Collaboration)
• Free software: MIT License
• Documentation: https://rcalderonb6.github.io/greapy

Citation

If you use GREApy in your research, please cite:

@article{Calderon:2025dhj,
    author = "Calderon, R. and others",
    title = "{Constraining GREA, an alternative theory accounting for the present cosmic acceleration}",
    eprint = "2509.21491",
    archivePrefix = "arXiv",
    primaryClass = "astro-ph.CO",
    reportNumber = "DESI-2024-0464, IFT-UAM/CSIC-25-99, FERMILAB-PUB-25-0737-PPD",
    month = "9",
    year = "2025"
}

and the original GREA formulation

@article{Garcia-Bellido:2021idr,
    author = "Garcia-Bellido, Juan and Espinosa-Portales, Llorenc",
    title = "{Cosmic acceleration from first principles}",
    eprint = "2106.16014",
    archivePrefix = "arXiv",
    primaryClass = "gr-qc",
    reportNumber = "IFT-UAM/CSIC-21-75",
    doi = "10.1016/j.dark.2021.100892",
    journal = "Phys. Dark Univ.",
    volume = "34",
    pages = "100892",
    year = "2021"
}