This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
simplex graph. simplex graph Own work by Tom Ruen Tom Ruen talk created this work entirely by myself br en Sreejithk CommonsHelper Original uploader was Tomruen at org en January UTC Tom Ruen talk simplexgraph svg Tomruen original upload log page en simplexgraph Tomruen KB no simplex graph Tom Ruen talk created this