Graphs Flashcards
What is a graph?
A graph is a set of lines connecting points
What is a network?
A network is a graph (set of lines connecting points) with weighted edges
What is the name for 2 graphs which are the same?
Isomorphic
What does isomorphic mean?
2 graphs are the same
What is a degree/order?
The degree/order is the number of edges connected to a vertex
What can vertices be?
Vertices can be even or odd
What is a walk?
A walk is a sequences of edges where the end vertex of one edge is the start vertex of the next
What is a trail?
A trail is a walk (sequences of edges where the end vertex of one edge is the start of the next) where none of the edges are repeated
What is a path?
A path is a trail and where none of the vertices are repeated
What is a cycle/circuit?
A cycle/circuit is a closed path where the end of the path joins back to the beginning
What are other names for lines?
Edges/arcs
What are other names for points?
Vertices/nodes
What is a simple graph?
A simple graph has no loops and at most one edge connecting any pairs of vertices
When are 2 vertices connected?
2 vertices are connected if there is a path between them
What is a connected graph?
A connected graph is when all the pairs of vertices are connected