noun
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geometrya point where two or more lines or edges meet.
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graph theoryan atomic part of a graph, representing an entity that can be connected to other vertices via edges.
A vertex is a point where two or more lines or edges meet.
In graph theory, a vertex, or node, is one of the objects a graph connects with edges.
A line is a straight, one-dimensional figure that extends infinitely in both directions.
A graph is a visual representation of a function or data in the Cartesian coordinate system. In graph theory, it means a set of vertices connected by edges.