AI RESEARCH
One-Step Score-Based Density Ratio Estimation
arXiv CS.LG
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ArXi:2604.10672v1 Announce Type: cross Density ratio estimation (DRE) is a useful tool for quantifying discrepancies between probability distributions, but existing approaches often involve a trade-off between estimation quality and computational efficiency. Classical direct DRE methods are usually efficient at inference time, yet their performance can seriously deteriorate when the discrepancy between distributions is large.