Keywords: Four color theorem map of Germany 1.png en Four color theorem Step 1 Here is a map of provinces of Germany This is a DIFFICULT problem in two-dimensional space Borders wander It's necessary to translate the problem into something workable 1 of 3 diagrams 2012-04-17 own Tomwsulcer Note I created this chart originally for use in the Citizendium article Four color theorem The earlier diagram was also public domain In the diagrams it is noted PD public domain http //en citizendium org/wiki/Four_color_theorem here cc-zero Uploaded with UploadWizard Blank maps of Germany |