## Problem 053 — rank:219

**Title:** Biological modularity

**Added binding assumptions (LaTeX):**

```latex
For each candidate partition define module outputs by a fixed assignment rule, with common physical units or explicit loss weights. Specify how boundary trajectories are clamped and how isolated modules are reconnected. The finite partition optimization is well-defined once these choices are fixed; its biological interest is transfer and perturbation stability, not the existence of a minimum over a finite set.
```

**Direct edits:** 0. **Fresh external checks:** None; supplied sources retained as provenance.