Neural networks are playing a crucial role in everyday life, with the most modern generative models able to achieve impressive results. Nonetheless, their functioning is still not very clear, and several strategies have been adopted to study how and why these model reach their outputs. A common approach is to consider the data in an Euclidean settings: recent years has witnessed instead a shift from this paradigm, moving thus to more general framework, namely Riemannian Geometry. Two recent works introduced a geometric framework to study neural networks making use of singular Riemannian metrics. In this paper we extend these results to convolutional, residual and recursive neural networks, studying also the case of non-differentiable activation functions, such as ReLU. We illustrate our findings with some numerical experiments on classification of images and thermodynamic problems.

神经网络在生活中起着至关重要的作用，最现代的生成模型能够取得令人印象深刻的结果。本文将几何框架应用于研究神经网络，探讨卷积、残差和递归神经网络，以及非可微激活函数的情况，并通过图像分类和热力学问题的数值实验来说明研究结果。

深度神经网络的奇异黎曼几何方法III. 分段可微层与$n$维类的随机漫步