Zigzag engine: cubical/string-diagram constructions in Rust. Reference for topolei.
5d21c75178
Complete the explosion module for layout computation:
- Poset methods: is_less_than, less_than_or_equal, is_comparable,
minimal_elements, maximal_elements, topological_sort
- Covering relations: compute_covers() from poset ordering
- k_points: Full implementation with proper covering relation computation
- Point ordering: Product ordering on height labels with zigzag structure
- HeightLabel ordering: r_j < s_j < r_{j+1} within each dimension
- Injectification stub for future layout integration
The poset structure captures the combinatorial data needed for
embedding Pt_n(X) -> R^n in the layout algorithm.
All 55 tests pass.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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