Contribute correction: Delta - Analytic Function Tracer

 _    _     ______    _____    __   __  
| \  / ||  /_   _//  / ____||  \ \\/ // 
|  \/  ||   -| ||-  / //---`'   \ ` //  
| .  . ||   _| ||_  \ \\___      | ||   
|_|\/|_||  /_____//  \_____||    |_||   
`-`  `-`   `-----`    `----`     `-`'