This note is linked from research/apo-master-index and points readers toward the PDF-oriented workflow in research/pdf-catalog.

Rendering requirement

The site should preserve source math rather than turning equations into screenshots:

A(t)=Ωρ(x,t)logρ(x,t)dx\mathcal{A}(t) = \int_{\Omega} \rho(x, t)\log \rho(x, t)\,dx

That keeps notes searchable, diffable, and reusable for agents.