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Distributed TD(0) with Almost No Communication

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arxiv 2305.16246 v1 pith:LTDU5AAH submitted 2023-05-25 cs.LG cs.SYeess.SYmath.OC

Distributed TD(0) with Almost No Communication

classification cs.LG cs.SYeess.SYmath.OC
keywords distributedtimeconvergencedifferencelineartemporalagentsalmost
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We provide a new non-asymptotic analysis of distributed temporal difference learning with linear function approximation. Our approach relies on ``one-shot averaging,'' where $N$ agents run identical local copies of the TD(0) method and average the outcomes only once at the very end. We demonstrate a version of the linear time speedup phenomenon, where the convergence time of the distributed process is a factor of $N$ faster than the convergence time of TD(0). This is the first result proving benefits from parallelism for temporal difference methods.

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