What Is a Graphical Sequence?
Examine everything surrounding What Is a Graphical Sequence in this comprehensive guide.
A degree sequence is said to be graphical if there exists a simple graph having it as its vertex degrees. The Havel–Hakimi theorem states that if the starting degree sequence is graphical, then the algorithm will succeed in connecting up all stubs without creating any self-loops.
How to draw a graph for a graphic sequence?
The following sequences are graphic. Try to draw a graph for each one of them. You can see the answer by clicking the link next to them. Note: A graph has a unique degree sequence. But more than one different graphs might be possible for the same graphic sequence. To add a vertex left click on whitespace.
Is the sum of degree sequence always twice the size of the graph?
In the diagram, the text inside each vertex tells its degree. Draw some graphs of your own and see their degree sequence. You will observe that the sum of degree sequence is always twice the size of graph. This is, in fact, a mathematically proven result (theorem).
Is the degree sequence of a graph always nonincreasing?
Note: The degree sequence is always nonincreasing. Therefore, every graph has a unique degree sequence. In the diagram, the text inside each vertex tells its degree.