people.math.aau.dkpeople.math.aau.dk/~matarne/14-kompleks/historisk-note.pdfintegral signs stand for...
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people.math.aau.dkpeople.math.aau.dk/~matarne/14-kompleks/historisk-note.pdfintegral signs stand for antidifferentiation. Because P is the integral of the differential Mdx — N dy