Learning the Stellar Structure Equations via Self-supervised Physics-Informed Neural Networks. - Manuel Ballester; Santiago López-Tapia; Seth Gossage; Patrick Koller; Philipp M. Srivastava; Ugur Demir; Yongseok Jo; Almudena P. Marquez; Christoph Wuersch; Souvik Chakraborty; Vicky Kalogera; Aggelos K. Katsaggelos (CoRR, 2026)