Talk:Runcination

"Runcination"
Norman Johnson invented the term runcinated, in conjunction for his names for the polychora (4d polyhedra). Here it corresponds to the form where the first and fourth node are marked. Jonathan Bowers has the name -prismato- for this meaning.

One further notes that Stott's expand has a meaning of placing any node on the Dynkin graph. Literally, a polytope is expanded when one moves figures in some symmetry radially outwards, with no change in size. This move creates new surtopes (elements). It is easiest to grasp when the element moved out is a face, which is what the contracted meaning gives. --Wendy.krieger (talk) 10:54, 31 December 2009 (UTC)


 * Has Johnson published the term in a verifiably reliable source (WP:RS) or is all this just WP:OR? &mdash; Cheers, Steelpillow (Talk) 19:19, 26 December 2014 (UTC)


 * The term is used in the 2004 dissertation proof of the uniform 4-polytopes (taken from George's webpages), and in Conway's 2008 book thanks to a coauthor Chaim Goodman-Strauss, but not explicitly defined, just associated with a ring pattern t03, along with rectification t1, bitruncation t12, cantellation t02, cantitruncation t012, runcitruncation, t013, and omnitruncation for t0123 (all rings of 4). Tom Ruen (talk) 22:33, 26 December 2014 (UTC)
 * Fair enough, thank you. &mdash; Cheers, Steelpillow (Talk) 11:34, 27 December 2014 (UTC)