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More ties than we thought
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 and 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.Comment: Accepted at PeerJ Computer Science 12 pages, 6 color photograph
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