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MathFormer: Mathematical Reasoning or Pattern Matching

·2026.06.28 03:57

Key point

A small model with 4M parameters achieved high accuracy on symbolic math tasks without any mathematical knowledge.

Details

MathFormer explores the essence of mathematical ability through a seq2seq model that predicts the expanded form of a given factorized expression.

The research found that a model with just 4M parameters, with no mathematical knowledge whatsoever, achieved approximately 98.6% accuracy on symbolic math tasks. This suggests that the model learned patterns of structural token transformations rather than understanding the concept of operators or variables.

This result can serve as evidence supporting the possibility that the mathematical 'reasoning' ability shown by large language models (LLMs) is in fact large-scale structured pattern completion.

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