Beta Function

The survival model defines survival probability as an exponential function involving characteristic life and an age-dependent beta function. For highest ages above alpha, the study used a quadratic beta function to describe maximum survival tendency. The theoretical maximum lifespan omega is defined where beta(x) equals f(x). The model places omega between the beta-function vertex and the upper x-intercept q. The fitted quadratic beta function is the central mechanism used to explain the proposed lifespan limit.