@ARTICLE{10.21494/ISTE.OP.2024.1160, TITLE={Approximation of the first conditions of the expansion of the Universe, entropy generation and gravity}, AUTHOR={Faycal Ben adda, }, JOURNAL={Entropy: Thermodynamics – Energy – Environment – Economy }, VOLUME={5}, NUMBER={Special issue LILA 2}, YEAR={2024}, URL={https://openscience.fr/Approximation-of-the-first-conditions-of-the-expansion-of-the-Universe-entropy}, DOI={10.21494/ISTE.OP.2024.1160}, ISSN={2634-1476}, ABSTRACT={To overcome the lack of astronomical data on the first conditions of the expansion of the universe, a model compatible with the fundamental principle of cosmology allows to describe the first conditions of the expansion of the universe by a state function that defines the entropy through the transformation of the local curvature of the space-time. The consideration of matter, energy and radiation in the model allows to describe the first conditions necessary for its transformation after its instantaneous dislocation by the simultaneous expansion of the basic elements of the initial space. The model elucidates the uniform distribution of matter 380,000 years after the start of expansion and leads to the identify the origin of gravity.}}