https://carlosdanieljimenez.com/tags/bertopic/Recent content in Bertopic on The Probability EngineHugo -- 0.147.3en-usTue, 16 Jun 2026 00:00:00 +0000https://carlosdanieljimenez.com/post/2026-06-16-beatles-lyrical-evolution/Tue, 16 Jun 2026 00:00:00 +0000https://carlosdanieljimenez.com/post/2026-06-16-beatles-lyrical-evolution/<h2 id="abstract">Abstract</h2> <p>This study traces the lyrical evolution of the Beatles across four albums — <strong>Rubber Soul (1965)</strong>, <strong>Revolver (1966)</strong>, <strong>Sgt. Pepper&rsquo;s Lonely Hearts Club Band (1967)</strong> and <strong>Abbey Road (1969)</strong> — using a pipeline of LLM-driven topic modeling (BERTopic), a vector database (OpenAI <code>text-embedding-3-large</code> indexed in ChromaDB), embedding geometry, and graph theory. The study puts a falsifiable question to the <strong>canonical critical narrative</strong> — that the Beatles moved through four discrete stylistic eras — by testing whether the albums occupy <em>separable</em> territories in lyrical-semantic space.</p>