Rafael Fuentes Rangel
Software Engineer · ML/AI Engineer
I build production-oriented AI systems and agentic workflows, and I explore problems at the intersection of machine learning, software engineering, mathematics, and scientific research. This site collects my research notes, engineering projects, and a working notebook.
Current Focus
- Production ML/AI systems and agentic workflows.
- Mathematics and scientific computing as engineering tools.
- Research tooling: making experiments reproducible and legible.
Selected Research
all research →- A Geometric Classification of the Depressed Cubic Family
Expository mathematical note · Jul 20, 2026
Notebook Log
all entries →- When the Nearest Neighbor Is Everyone's Neighbor
Aug 3, 2026
A 50-document retrieval experiment where cosine similarity's aggregate metrics looked fine while a handful of documents kept surfacing for unrelated queries. Measuring the neighbor graph directly, and correcting it with CSLS, separates a geometric problem from a semantic one, and shows why fixing the first barely touches the second.
Start Here
New to the site? These are good entry points:
- A research noteA Geometric Classification of the Depressed Cubic Family
- The working notebookExploratory notes and early ideas