arXiv: cs.AI preprintsInternational6 November 2026
AAC: Admissible-by-Architecture Differentiable Landmark Compression for ALT
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arXiv:2604.20744v2 Announce Type: replace Abstract: We introduce the Architecturally Admissible Compressor (AAC), which adapts landmark-based A* heuristics to query demand under a fixed label-memory budget. AAC provides two continuous relaxations of ALT (A*, Landmarks, and Triangle inequality) selection. With exact landmark distances, every parameter value defines a lower bound on shortest-path distance. Both relaxations deploy ALT using only the selected labels. The row-stochastic relaxation takes convex combinations of landmark distances. We characterize the maximal admissibility-preserving
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