may i know what is the difference between a path and a walk, they seem to be the same thing to me.
i classified a walk as abcdef where each alphabet represents a vertex but my tutor said that that is a path...
A walk is a finite sequence of vertices and edges beginning and ending with a vertex. Here both vertices and edges could repeat.
A path is a walk with distinct vertices and edges with the starting vertex and end vertex. Also the starting and end vertex in a path must be distinct.
So by the definitions we can see that every path is a walk.
For a more detailed discription refer Glossary of graph theory - Wikipedia, the free encyclopedia
One text book on graph theory has a hierarchy of terms: walk, a trail, and a path.
A walk is a collection of successive adjacent edges.
A trail is a walk in which all edges are distinct.
A path is a trail in which all vertices are distinct.