Plotting in a Formally Verified Way

An invaluable feature of computer algebra systems is their ability to plot the graph functions. Unfortunately, when one trying design a library mathematical functions, this often falls short, producing incorrect and potentially misleading plots, due accuracy issues inherent use case. This paper investigates what it means for be correct how formally verify property. The Coq proof assistant then turned into tool plotting function graphs using reliable polynomial approximations. provided as part CoqInterval library.