Some other forms of convex → might be more useful compared to another.
Not fully convex → but look like convex → strange looking functions. (def can be applied to operation optimization → such as cash flow or economic).
How this type of study can be applied to ECN → in the real world optimization problem.
Many sigmoid type functions → log-concave.
Like we can see above.
Convolution → is also the log-concave → product is log-concave → sum is not.
This really relates to optimization and operation research.
The final generalization is to vector operation.