¿Buscas de los conceptos físicos del relato (como el Principio de Fermat)?
It sounds like you’re asking for a summary or retelling of the story from Ted Chiang’s "Historia De Tu Vida" — which is the Spanish title of his famous novella, better known in English as (The PDF you mentioned is likely a Spanish-language version of that work.) Historia De Tu Vida Ted Chiang.pdf
The film adaptation stays remarkably faithful to Chiang’s core ideas but adds geopolitical tension and a more explicit mystery structure. The novella is quieter, more philosophical, and focuses almost exclusively on Louise’s internal transformation. ¿Buscas de los conceptos físicos del relato (como