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 pst-contourplot PSTricks package
            Examples  
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Manuel Luque (c) 2018

The pst-contourplot package allows to draw  implicit functions f(x,y)=0 with options for coloring the inside of the surfaces, to marking  the points and  arrowing the curve at points chosen by the user. This package uses the "marching squares" algorithm.

This material is subject to the LaTeX Project Public License. See
http://mirror.ctan.org/help/Catalogue/licenses.lppl.html
for the details of that license.

