Hamilton Starters and Path Decompositions in Directed Circulants

arXiv:2609.01256 2026 Architecture 1 ideas extracted · analyzed Sep 2, 2026

What the math gives to ML

The paper gives an explicit decomposition of a dense directed circulant graph into Hamilton cycles and, after coordinated edge deletion, into only r+1 directed paths. The transferable asset is not merely graph factorization, but exact coverage of every local offset edge together with long ordered traversals that can be executed as scans. This suggests a deterministic sparse token-mixing or graph-neural layer that replaces irregular offset aggregation with a small set of reusable path scans, potentially improving kernel fusion and memory locality. The first experiment should compare path-ordered aggregation with explicit local attention at equal edge count and parameter count.

Ideas from this paper

Unverified 2026

Hamiltonian Path Scan Layer

Build a fixed sparse token-mixing layer on n=qr cyclic positions whose directed edges are all offsets 1 through r, but execute the edges through r Hamiltonian path scans plus one prescribed chain. The paths preserve exact coverage of the circulant connectivity while exposing long sequential traversals that can be fused into custom kernels, recurrent scans, or state-space updates.

Useful5/10
Difficulty6/10
Novelty7/10
Paper: Hamilton Starters and Path Decompositions in Directed Circulants arXiv:2609.01256