How many additional edges need to be colored red in order for red edges to make an edge cover of this graph?
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
The answer is 1 edge. The only node not touching a red edge is the bottom right node. If either edge incident on that node is changed to red, then the graph has a full edge covering.