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Conference Papers Year : 2021

Plotting in a Formally Verified Way

Abstract

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

hal-03168208 , version 1 (12-03-2021)
hal-03168208 , version 2 (02-05-2021)

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Guillaume Melquiond. Plotting in a Formally Verified Way. Proceedings of the 6th Workshop on Formal Integrated Development Environment, May 2021, Online, United States. pp.39-45, ⟨10.4204/EPTCS.338.6⟩. ⟨hal-03168208v2⟩
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