👉 In mathematics, a recto-sigmoid function is defined as follows: f(x) = 1 - (1/2)x^2 + (1/4)x^4 This function represents the probability density of an event where the value of x is between 0 and 1. The function can be visualized as a sigmoid curve, which is a type of curve that is symmetrical about its minimum point. The recto-sigmoid function has several important properties: - It is