A pseudograph is a non-simple graph in which both graph loops and multiple edges are permitted (Zwillinger 2003, p. 220).
Pseudograph
See also
Graph Loop, Hypergraph, Multigraph, Multiple Edge, Reflexive Graph, Simple GraphExplore with Wolfram|Alpha
References
Harary, F. Graph Theory. Reading, MA: Addison-Wesley, p. 10, 1994.Skiena, S. Implementing Discrete Mathematics: Combinatorics and Graph Theory with Mathematica. Reading, MA: Addison-Wesley, p. 89, 1990.Zwillinger, D. (Ed.). CRC Standard Mathematical Tables and Formulae, 31st ed. Boca Raton, FL: CRC Press, 2003.Referenced on Wolfram|Alpha
PseudographCite this as:
Weisstein, Eric W. "Pseudograph." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Pseudograph.html