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cs.IR2026
When Does Permutation Instability Generalize? Independent-View Validation for Listwise LLM Reranking
Wenzhang Du
Listwise language-model rerankers often disagree across equivalent candidate permutations. Finite instability diagnostics are therefore used to motivate additional sampling, aggreg…
cs.IR2026
Which Reranking Conclusions Survive the Answer Interface? A Prospective Finite-Orbit Audit
Wenzhang Du
Rerankers are increasingly evaluated through downstream language-model answers. This raises a retrieval-measurement question: if only the reader's answer interface changes, should…
cs.IR2026
What Would Fix This RAG Failure? Auditing Counterfactual Response with Paired Evidence Interventions
Wenzhang Du
A failed retrieval-augmented generation (RAG) answer can be consistent with several unseen responses to evidence repair. We introduce Pair-ID, an offline audit that holds one query…