Luise Vitetta Teoria Dei Segnali.pdf [extra Quality] Here

Between equations she found small marginal notes in a different hand. In elegant, looping script someone had written short, human observations: "Remember why this matters — you listen to the ocean when you study waves." "Keep curiosity longer than answers." The notes were unsigned but unmistakably intimate, like breadcrumbs left for a later self.

Here is the blog post: