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Author

Aras Kavuncu

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Preprint Sep 2026

Storing Is Not Remembering: LSTM-UT and Bounded Gated Memory for Looped Transformers

In OpenWebText2 language modelling, LSTM-UT outperforms CoTFormer and, at equal width, reaches slightly lower perplexity than CoTFormer while CoTFormer needs up to 91% more training time per step; against a parameter-matched CoTFormer, LSTM-UT comes within 0.6 perplexity.

Aras Kavuncu, Muhammad Burhan Hafez · 0 citations
#machine learning Preprint Sep 2026

LSTM-UT and Recurrent-Depth Transformers on Cellular Automata

Recurrent-depth Transformers apply shared computation repeatedly, but differ in how they retain information across steps. We compare a Block Universal Transformer (BUT), which carries only its current hidden state; CoTFormer, which also retains an expanding attention cache; and a new LSTM Universal Transformer (LSTM-UT...

Aras Kavuncu · 0 citations

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