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== Introduction to Neural Networks ==

Before we can dive into PyTorch, we need to introduce the general concepts behind Neural Networks and AI programing. You have probably heard of AI and machine learning, and have seen some examples of what they can do, but I wonder if you know the difference between AI, Machine Learning, and Deep Learning? The confusion usually comes from thinking of them as separate ideas, but it is more helpful to think of them as belonging to a hierarchy, where Machine Learning is a subset of AI, and Deep Learning is a smaller subset within the subset of Machine Learning. This handy infographic goes into more detail:

[[File:Figure1.jpg]]

=== Machine Learning vs. Deep Learning ===