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The unreasonable effectiveness of the forget gate (arxiv.org)
3 points by Anon84 on Mar 20, 2019 | hide | past | pdf | discuss on HN

In plain words: A memory network that keeps only the forget gate, which decides what to erase, with starting values set to hold memories for chosen lengths of time. It runs cheaper than the three-gate LSTM and scores 92.5% on a digit-order task, beating the standard LSTM.

Abstract

Given the success of the gated recurrent unit, a natural question is whether all the gates of the long short-term memory (LSTM) network are necessary. Previous research has shown that the forget gate is one of the most important gates in the LSTM. Here we show that a forget-gate-only version of the LSTM with chrono-initialized biases, not only provides computational savings but outperforms the standard LSTM on multiple benchmark datasets and competes with some of the best contemporary models. Our proposed network, the JANET, achieves accuracies of 99% and 92.5% on the MNIST and pMNIST datasets, outperforming the standard LSTM which yields accuracies of 98.5% and 91%.

Jos van der Westhuizen, Joan Lasenby
arXiv:1804.04849 · cs.NE, cs.LG, stat.ML · submitted Apr 13, 2018 · updated Sep 13, 2018
abstract · pdf · html · Corrected LSTM gradient derivations. Added link to code

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Also discussed: Apr 2018 (3 points, 0 comments)