4 papers
Controlling Authority Retrieval: A Missing Retrieval Objective for Authority-Governed Knowledge
Andre Bacellar
In law, regulatory regimes for pharmaceuticals and software security, newer authorities can revoke older established ones even when semantically distant. We call this CAR: retrievi…
Regime-Conditional Retrieval: Theory and a Transferable Router for Two-Hop QA
Andre Bacellar
Two-hop QA retrieval splits queries into two regimes determined by whether the hop-2 entity is explicitly named in the question (Q-dominant) or only in the bridge passage (B-domina…
BridgeRAG: Training-Free Bridge-Conditioned Retrieval for Multi-Hop Question Answering
Andre Bacellar
Multi-hop retrieval is not a single-step relevance problem: later-hop evidence should be ranked by its utility conditioned on retrieved bridge evidence, not by similarity to the or…
Calibrated Fusion for Heterogeneous Graph-Vector Retrieval in Multi-Hop QA
Andre Bacellar
Graph-augmented retrieval combines dense similarity with graph-based relevance signals such as Personalized PageRank (PPR), but these scores have different distributions and are no…