0 two letters written together that make one sound: --
In English, the digraph "ph" is pronounced as /f/.
The reader may replace everywhere the term 'relation' by 'digraph'.
The usual recursive definition of the reachability of a vertex in a digraph is tight only when the graph is acyclic.
One of the two random variables, the number of sources in a random acyclic digraph, has a transition probability which is only time dependent.
Any monomorphism of this algebra is a digraph embedding.
When we consider the connectivity of digraphs we find that much less has been done.
The control items for the digraphs were words with initial or final consonant clusters.
A semicomplete digraph without cycles of length two is a tournament.
We follow an arc of the digraph whenever the insertion radius of a point x is less than f (x).
