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Gottfried Leibniz demonstrates integral calculus for the first time to find the area under the graph of y = ƒ(x).
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Gottfried Wilhelm Leibniz
German polymath (1646–1716)
Gottfried Wilhelm Leibniz was a German polymath active as a mathematician, philosopher, scientist and diplomat who is credited, alongside Sir Isaac Newton, with the creation of calculus in addition to many other branches of mathematics, such as binary arithmetic and statistics.…Source: Wikipedia (CC BY-SA)
Integral
Operation in mathematical calculus
In mathematics, an integral is the continuous analog of a sum, which is used to calculate areas, volumes, and their generalizations. Integration, the process of computing an integral, is one of the two fundamental operations of calculus, the other being differentiation.…Source: Wikipedia (CC BY-SA)