[A058387] Series-Parallel Confusion

N. J. A. Sloane njas at research.att.com
Fri Nov 8 04:20:16 CET 2002

a 3-star is no a series-parallel network

the definition is that o is a s.p. n/w
and so are all networks that can be obtained by putting 2 of them in series or in parallel

they all have two terminal nodes (which coicide in the case of o)
and you put two in series or parallel by doing the obvious things
to the terminbal nodes


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