On the number of transitive digraphs withn labeled vertices andk arcs |
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Authors: | P. Filipponi |
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Affiliation: | (1) Fondazione Ugo Bordoni, V.le Trastevere 108, 00153 Roma |
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Abstract: | A computer determination of the numberT n,k of transitive digraphs onn labeled vertices andk arcs is obtained for 2≤n≤6,0 ≤k≤n 2-n. Furthermore some formulae are given for determiningT n,k, ∇n for extremal values ofk (namely, 0≤k≤6 andn 2 -3n+4≤k≤n 2-n). Work carried out at Fondazione Ugo Bordoni under the agreements between Fondazione Ugo Bordoni and the Istituto Superiore P. T. |
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