We have seen that satisfies . We will often leave the constant $h$ out of the notation and use terminology like for the “derivative”. It makes sense not to simplify to $x^n$ since the algebra structure is different. Define the … Continue reading → […]
Let denote the discrete derivative of a continuous function f on the real line. In this post, I assume that all functions are continuous of have compact support. They are zero outside some large interval. No smoothness is required of … Continue reading → […]
Assume f is a continuous function of one real variable. Lets call a point p a critical point of f if Df(p)=0 where Df(x) = f(x+1)-f(x) is the discrete derivative of f. As in classical calculus, a point p is … Continue reading → […]