%%visits: 3 This is a [[set]] of vertices and edges. Vertices are end
points, and edges must connect points. ## intuition walk:~ A way to
traverse between one point and another. trail:~ Think of a normal trail
down a park. In a trail, you don’t mind going in a loop around a point,
the main point is that you don’t want to walk the same edge again and
again. path:~ Think of a path to get from point a to b. Now loops of are pointless. I
want to get from point a to
b so why do I want to go
around in circles? This is the idea behind. ## rigour length of the wal
:= the number of edges in the walk. %% ==exam clinic %%
==examples and non-examples %% ==related tags math