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Recent results in topological graph theory
(Kluwer Academic Publishers; Akadémiai Kiadó ; Springer Science+Business Media, 1964-09)
A graph theoretic approach to similarity relations
(Springer-Verlag; Psychometric Society, 1964-06)
A similarity relation is reflexive and symmetric. A graph may be regarded as a geometric representation of an irreflexive symmetric relation; an r -graph then coincides with a similarity relation. For the realization of ...
Elementary Problem solution list E1641, American Mathematical Monthly, October, 1964.
(Mathematical Association of America, 1964-10)