[seqfan] Re: graph terminology

[Richard Mathar]

http://list.seqfan.eu/pipermail/seqfan/2010-September/006101.html

ed> (a) n triangles 
ed> 
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.

n-triangular stitch

Co-edged triangular traffic jam.

n-triangle leporello

triangular domino n-ladder

ed> b) n 2p-cycles; adjacent cycles are joined by one 
ed> edge placed at diametrically opposite nodes. 
ed> 
ed> For p=2 and n=3 we have 
ed> 
ed> <>-<>-<>  

n-chain of 2p-rings on 2pn nodes with n-1 bridges.

n-cyclo 2p-tan.

perl-chain of n 2p-rings