Sigmoid
Sigmoid is a mathematical activation function that maps any real-valued number into a value between 0 and 1, producing an S-shaped curve.
Frequently Asked Questions
What is the formula for the Sigmoid function?▼
The Sigmoid function is defined as f(x) = 1 / (1 + e^(-x)), which asymptotes at 0 and 1.
What is a major limitation of the Sigmoid function in deep networks?▼
It suffers from the vanishing gradient problem, because for very large or very small inputs, the gradient of Sigmoid is extremely close to zero, stopping weight updates.
Quick Facts
- CategoryMathematical Foundations
- Key ApplicationBinary classification output layers, logistic regression models, and gating mechanisms in LSTMs.
Coverage Trend12 Weeks
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