Two distinct incidences **adjacent** if either the vertices

and and , or , and

In simpler terms:

- two vertices that are connected by an edge are
*adjacent* - two edges that share a vertex are
*adjacent*

Two distinct incidences **adjacent** if either the vertices

and and , or , and

In simpler terms:

- two vertices that are connected by an edge are
*adjacent* - two edges that share a vertex are
*adjacent*