@Sebastian Bodenstein Yes, I am currently writing a paper on activation functions based on fractional calculus. I am currently implementing it in python, however Wolfram would be much better fit for it due to it having inbuilt functions from fractional calculus from which I derive my specific function.
However when I try to use it with ElementwiseLayer, it gives an error of ElementwiseLayer::invscf: my_func could not be symbolically evaluated as a unary scalar function.
(Interestingly, it is a unary scalar function because it can be plotted using only one variable and gives out scalar values when individually applied over scalar values)