This document summarizes a Chainer meetup where Yuta Kashino presented on PyTorch. Key points discussed include: - Yuta Kashino is the CEO of BakFoo, Inc. and discussed his background in astrophysics, Zope, and Python. - PyTorch was introduced as an alternative to Chainer and TensorFlow that is Pythonic and defines models dynamically through code. - PyTorch uses autograd to track gradients like Ch