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Back to the lesson libraryMECHANISM · 12 MIN
M11.2 CONNECT THE MECHANISM

Why layers need more than multiplication

A staircase light with two switches stumps any single straight-line rule, and any stack of them. See why one small bend between layers fixes it.

LESSON OVERVIEW12 min lesson

Lesson overview

A staircase light with two switches stumps any single straight-line rule, and any stack of them. See why one small bend between layers fixes it.

What you’ll explore

  • Trace a nonlinear hidden computation and explain why composing affine maps alone cannot represent XOR.
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Original explanations, connected to the research.

Dive into Deep Learning — multilayer perceptronsCybenko — Approximation by superpositions of a sigmoidal function (1989)
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