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Directed vs. Undirected Graphs in NNs: The (Surprising!) Implications

Directed vs. Undirected Graphs in NNs: The (Surprising!) Implications

Most of us don’t always use graph language to describe neural networks, but if we dig into the implications of graph theory language, we get some surprising (and very useful) insights! We probably all know that a typical feedforward neural network can be described as a “directed graph.” Many of us also know that a restricted Boltzmann machine (RBM) is an “undirected graph.” In this little difference of terms, there is a wealth of meaning. Salakhutdinov, Mnih, and Hinton (2007;…

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