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    pretty_print(r'$\int \frac{1}{x^2 + y^2}(xdy-ydx)=%d$'%winding_number_integral(x,y,a,b))     pretty_print(html(r'$\int \frac{1}{x^2 + y^2}(xdy-ydx)=%d$'%winding_number_integral(x,y,a,b)))

Sage Interactions - Topology

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Winding number of a plane curve

by Pablo Angulo. Computes winding number (with respect to the origin!) as an integral, and also as a intersection number with a half line through the origin.

winding.png

interact/topology (last edited 2020-06-01 18:42:11 by kcrisman)