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What is: Accumulating Eligibility Trace?

Year2000
Data SourceCC BY-SA - https://paperswithcode.com

An Accumulating Eligibility Trace is a type of eligibility trace where the trace increments in an accumulative way. For the memory vector e_tRb0\textbf{e}\_{t} \in \mathbb{R}^{b} \geq \textbf{0}:

e_0=0\mathbf{e\_{0}} = \textbf{0}

e_t=v^(S_t,θ_t)+γλe_t\textbf{e}\_{t} = \nabla{\hat{v}}\left(S\_{t}, \mathbf{\theta}\_{t}\right) + \gamma\lambda\textbf{e}\_{t}