TKZ is a collection of packages that extend the functionality of the drawing package TikZ.

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Table of variation

I am trying to make a table of function variation with tkz-tab package, like Problem is that I don't know how I could obtain arrows like in the image. My code is: ...
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Removing a vertex of Petersen graph

How can we remove the vertex "e" of Petersen graph and replace with three vertices? I used for drawing Petersen this: \documentclass[11pt,bezier]{article} ...