trapezoidal rule

noun

Mathematics.

a numerical method for evaluating the area between a curve and an axis by approximating the area with the areas of trapezoids.

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I don’t have access to all of those papers, but given that several replies were to this paper were published noting that this is just a restatement of the trapezoidal rule, I’m willing to bet that a number of the citations to “Tai’s Model” are made in jest when a team uses calculus.