Groitzsch is located in Germany (Saxony) and time zone Europe/Berlin.
Places nearby are Zwenkau, Böhlen and Meuselwitz.
Berlin is 176 km away, Frankfurt am Main is 310 km away and Hamburg is 321 km away as the crow flies.
Distances from Groitzsch to the most important cities in Germany and the world.
Source: zeitverschiebung.net » Current Local Time » Groitzsch
51.1553600°
12.2827900°
Every triangle-free planar graph is 3-colorable
https://en.wikipedia.org/wiki/Grötzsch's_theoremTriangle-free graph requiring four colors
https://en.wikipedia.org/wiki/Grötzsch_graph