**Integral - Wikipedia**
https://en.wikipedia.org/wiki/Integral

OverviewHistoryTerminology and notationInterpretationsFormal definitionsPropertiesFundamental theorem of calculusExtensionsIn 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. Integration started as a method to solve problems in mathematics and physics, such as finding the area under a curve, or determini…

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