Give two examples of graphs that have circuits that are both Euler circuits and Hamiltonian circuits.
Give two examples of graphs that are both Euler circuits and Hamiltonian circuits.
Graphs that are both Euler circuits and Hamiltonian circuits.
We know that:
The degree of a vertex is the number of edges that connect to the vertex.
Note: a loop at a vertex counts as two edges.
An Euler circuit is a circuit that contains edge of the graph.
A Hamiltonian circuit is a simple circuit that passes through every vertex exactly once.
A connected graph has an Euler circuit if and only if each of the vertices has an even degree.
Two examples of graphs with Euler circuits and Hamilton circuits are given in the image below.
The two graphs below do contain an Euler circuit, because they are both connected graphs that contain vertices with even degrees only...
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