chore: import upstream snapshot with attribution

2026-07-13 13:38:23 +08:00
commit 2725b63d23
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+Modeling complex functions with artificial neural networks
+  Single-layer neural network recap
+  Introducing the multi-layer neural network architecture
+  Activating a neural network via forward propagation
+Classifying handwritten digits
+  Obtaining the MNIST dataset
+  Implementing a multi-layer perceptron
+Training an artificial neural network
+  Computing the logistic cost function