Paper · arXiv
The Tractability Landscape of Sampling with Inexact Scores
We provide a simple and tight characterization of the types of inexact score oracle access that permit sampling with vanishing total variation bias, for a standard, well-behaved target family. Our main result shows that any weaker error than the sub-Gaussian assumption used by [YW26] rules out the tractability of unbiased sampling. This strengthens the conclusion of [CCSW26] to be algorithm-agnostic, and to hold for a wider range of error assumptions.
| Authors | Anming Gu, Kevin Tian, Hubert Yang et al. |
|---|---|
| Primary category | stat.ML |
| Published | 21 July 2026 |
| Last updated at source | 21 July 2026 |
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