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Apr 8, 2019 at 5:30 comment added Toby Bartels Complex analysis does have $ \int \lvert d z \rvert $, which also computes the arclength.
Jan 13, 2011 at 2:47 comment added S. Carnahan I think it is customary to say "contour integral" for the complex analysis gadget, "line integral" for the multivariable calculus gadget, and "path integral" for a (not necessarily rigorously defined) integral over a space of fields.
Dec 16, 2010 at 14:13 history answered David E Speyer CC BY-SA 2.5