> For the complete documentation index, see [llms.txt](https://hujian.gitbook.io/deep-reinforcement-learning/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hujian.gitbook.io/deep-reinforcement-learning/fang-fa/jie-ji-you-xi/retrace-l.md).

# Retrace(λ)

> [Safe and Efficient Off-Policy Reinforcement Learning](https://arxiv.org/abs/1606.02647)