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新研究量化了对数凹分布和对数-Sobolev分布的采样复杂度

一篇新的研究论文探讨了在 d 维空间中从光滑分布采样的查询复杂度。该研究证明,对于条件数为 2 的强对数凹目标,任何随机采样器都需要至少 $\exp({\Omega(\log^{1/3} d)})$ 次查询,这表明在多对数维度依赖性方面存在局限性。此外,对于满足 $\alpha$-log-Sobolev 不等式且条件数为 $\kappa$ 的目标,在 $d\gtrsim\log^2\kappa$ 的维度下,建立了 $\Omega(\kappa)$ 的查询下界,证明了 log-Sobolev 采样比强对数凹采样更复杂。 AI

影响 为采样算法建立了理论限制,可能指导生成模型和统计推断的未来研究。

排序理由 该集群包含一篇详细介绍采样复杂度理论研究的学术论文。[lever_c_demoted from research: ic=1 ai=1.0]

在 arXiv stat.ML 阅读 →

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新研究量化了对数凹分布和对数-Sobolev分布的采样复杂度

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该集群包含一篇详细介绍采样复杂度理论研究的学术论文。[lever_c_demoted from research: ic=1 ai=1.0]
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报道来源 [1]

  1. arXiv stat.ML TIER_1 English(EN) · Huanjian Zhou, Taiji Suzuki ·

    关于强对数凹性和对数-Sobolev不等式下采样查询复杂度的研究

    arXiv:2611.05813v1 Announce Type: cross Abstract: We study the query complexity of sampling from smooth distributions on $\mathbb R^d$ using first-order oracles. For $d$-dimensional strongly log-concave targets with condition number $\kappa=2$, we prove that any randomized sample…