More ties than we thought

Autor: Dan Hirsch, Ingemar Markström, Meredith L. Patterson, Anders Sandberg, Mikael Vejdemo-Johansson
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: PeerJ Computer Science, Vol 1, p e2 (2015)
Druh dokumentu: article
ISSN: 2376-5992
DOI: 10.7717/peerj-cs.2
Popis: We extend the existing enumeration of neck tie-knots to include tie-knots with a textured front, tied with the narrow end of a tie. These tie-knots have gained popularity in recent years, based on reconstructions of a costume detail from The Matrix Reloaded, and are explicitly ruled out in the enumeration by Fink & Mao (2000). We show that the relaxed tie-knot description language that comprehensively describes these extended tie-knot classes is context free. It has a regular sub-language that covers all the knots that originally inspired the work. From the full language, we enumerate 266,682 distinct tie-knots that seem tie-able with a normal neck-tie. Out of these 266,682, we also enumerate 24,882 tie-knots that belong to the regular sub-language.
Databáze: Directory of Open Access Journals