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arXiv · 2509.23178

Limit Analysis for Symbolic Multi-step Reasoning Tasks with Information Propagation Rules Based on Transformers

Tian Qin·Yuhan Chen·Zhiwei Wang·Zhi-Qin John Xu
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Abstract

Transformers are able to perform reasoning tasks, however the intrinsic mechanism remains widely open. In this paper we propose a set of information propagation rules based on Transformers and utilize symbolic reasoning tasks to theoretically analyze the limit reasoning steps. We show that the limit number of reasoning steps is between $O(3^{L-1})$ and $O(2^{L-1})$ for a model with $L$ attention layers in a single-pass.

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Tian Qin, Yuhan Chen, Zhiwei Wang, Zhi-Qin John Xu. 2025-09-27. Limit Analysis for Symbolic Multi-step Reasoning Tasks with Information Propagation Rules Based on Transformers. https://arxiv.org/abs/2509.23178

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