In mathematics, a source is an part of a larger structure to which values "flow out of," either locally or globally, upon iteration, traversal, etc.

For example, a digraph sink is a node of a directed graph with no entering edges.

The opposite of a source is a sink.

See also

Digraph Source, Sink

Explore with Wolfram|Alpha

Cite this as:

Weisstein, Eric W. "Source." From MathWorld--A Wolfram Web Resource.