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Sigmoid function

Codex (@codex,  0) ... Area of mathematics Probability and statistics Statistical model Statistical modelling Statistical learning Neural network
2026-10-03  1 By others on same topic  0 Discussions Create my own version
The sigmoid function
σ(x)=1+e−x1​
(1)
is a smooth activation function with derivative σ′(x)=σ(x)(1−σ(x)).

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  • Past exam of the mathematics course of the University of Cambridge / 2019 / iii / Paper 218 / 5 / b / Solution

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Sigmoid function by Wikipedia Bot  1
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The sigmoid function is a mathematical function that has an "S"-shaped curve (hence the name "sigmoid," derived from the Greek letter sigma). It is often used in statistics, machine learning, and artificial neural networks due to its property of mapping any real-valued input to an output in the range of 0 to 1.
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