[seqfan] Re: graph terminology
mathar at strw.leidenuniv.nl
Sun Sep 26 23:30:37 CEST 2010
ed> (a) n triangles
ed> /\/\/\/\ please imagine 4 lower and 4 upper horizontal
ed> edges; here we have 7 triangles
Ribbon of n up-down-triangles with 2+n vertices.
Co-edged triangular traffic jam.
triangular domino n-ladder
ed> b) n 2p-cycles; adjacent cycles are joined by one
ed> edge placed at diametrically opposite nodes.
ed> For p=2 and n=3 we have
n-chain of 2p-rings on 2pn nodes with n-1 bridges.
perl-chain of n 2p-rings
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