OFFSET
1,3
COMMENTS
Under "series-equivalence" two graphs are equivalent if one can be obtained from the other by exchanging two subgraphs in series: replacing -A-B- by -B-A-.
REFERENCES
B. D. H. Tellegen, Geometrical configurations and duality of electrical networks, Philips Technical Review, 5 (1940), 324-330.
CROSSREFS
KEYWORD
nonn,nice,more
AUTHOR
N. J. A. Sloane, Dec 30 2000
STATUS
approved