True, but it has been confirmed experimentally several times. Unfortunately theoretical understanding in deep learning is quite lagging behind practical progres

True, but it has been confirmed experimentally several times. Unfortunately theoretical understanding in deep learning is quite lagging behind practical progress. This paper [1] seems to be getting closer to what you are looking for. [1] https://arxiv.org/abs/1910.02875 https://arxiv.org/abs/1910.02875