Das (2018) defines the triameter of a connected graph 
with vertex
set 
and vertex count at least 3 as
 |
where 
is the graph distance between vertices 
and 
.
Graph Triameter
See also
Graph Diameter, Graph DistanceExplore with Wolfram|Alpha
References
Das, A. "Triameter of Graphs." 3 Apr 2018. https://arxiv.org/abs/1804.01088.Cite this as:
Weisstein, Eric W. "Graph Triameter." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/GraphTriameter.html