arXiv:2509.00903nlin.CDcs.LG2025-09

用机器学习高效分类分形点,发现数学新规律。

Learning with Mandelbrot and Julia

  • 用多种机器学习模型识别分形点,替代传统数值方法。
  • KNN和随机森林准确率最高,计算成本显著降低。
  • 揭示分形结构隐藏规律,启发纯数学新猜想。

近期应用数学越来越多地借助机器学习(特别是监督学习)加速数值计算,例如求解非线性偏微分方程。本文将此类技术拓展至更具理论性的对象:分形集的分类与结构分析。以曼德尔布罗特集和朱利亚集为例,我们证明,包括分类与回归树(CART)、K近邻(KNN)、多层感知机(MLP)、使用长短期记忆(LSTM)和双向LSTM(BiLSTM)的循环神经网络、随机森林(RF)以及卷积神经网络(CNN)在内的多种监督学习方法,能够以远高于传统阈值法的预测精度和显著更低的计算成本对分形点进行分类。这些改进在不同模型和评估指标下均具有一致性。值得注意的是,KNN和RF表现最佳;模型间的对比分析(如KNN vs. LSTM)提示这些数学结构存在新的规律性特征。总体而言,我们的研究表明,机器学习不仅提升了分类效率,还为纯数学领域提供了生成新洞察、直觉和猜想的潜在路径。

原文摘要 · Abstract (English)

Recent developments in applied mathematics increasingly employ machine learning (ML)-particularly supervised learning-to accelerate numerical computations, such as solving nonlinear partial differential equations. In this work, we extend such techniques to objects of a more theoretical nature: the classification and structural analysis of fractal sets. Focusing on the Mandelbrot and Julia sets as principal examples, we demonstrate that supervised learning methods-including Classification and Regression Trees (CART), K-Nearest Neighbors (KNN), Multilayer Perceptrons (MLP), and Recurrent Neural Networks using both Long Short-Term Memory (LSTM) and Bidirectional LSTM (BiLSTM), Random Forests (RF), and Convolutional Neural Networks (CNN)-can classify fractal points with significantly higher predictive accuracy and substantially lower computational cost than traditional numerical approaches, such as the thresholding technique. These improvements are consistent across a range of models and evaluation metrics. Notably, KNN and RF exhibit the best overall performance, and comparative analyses between models (e.g., KNN vs. LSTM) suggest the presence of novel regularity properties in these mathematical structures. Collectively, our findings indicate that ML not only enhances classification efficiency but also offers promising avenues for generating new insights, intuitions, and conjectures within pure mathematics.

分形分析机器学习数学发现

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