Foundations Series

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This English page provides a localized entry and navigation shell. The full article body is currently available in Chinese.

This series builds a theory-oriented path through FFT, orthonormal bases, the universal approximation theorem, PCA, and autoencoders.

Series directory

1. Foundations 1: Understanding FFT

2. Foundations 2: Orthonormal Bases in Theory and Practice

3. Foundations 3: Proving the Universal Approximation Theorem

4. Foundations 4: From Fourier Representation to Universal Approximation

5. Foundations 5: Autoencoders and PCA Equivalence

6. Foundations 6: Between PCA and Universal Approximation