Δx→dx

#limit definition #derivative #delta x #dx #finite difference #infinitesimal difference

∑(-1)ᵏ(𝛼C𝑘)𝑓(𝑥−𝑘ℎ)

#grünwald–letnikov formula #binomial coefficient #finite difference #fractional calculus #sum definition #alternating series

∆/⏰

#change over time #finite difference #calculus approximation #discrete time #time rate #average rate