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Date: 21-9-2018
1403
Date: 22-6-2019
2569
Date: 20-9-2019
1552
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The sigmoid function, also called the sigmoidal curve (von Seggern 2007, p. 148) or logistic function, is the function
(1) |
It has derivative
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and indefinite integral
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It has Maclaurin series
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where is an Euler polynomial and is a Bernoulli number.
It has an inflection point at , where
(10) |
It is also the solution to the ordinary differential equation
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with initial condition .
REFERENCES:
von Seggern, D. CRC Standard Curves and Surfaces with Mathematics, 2nd ed. Boca Raton, FL: CRC Press, 2007.
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