Enumerating orientations of the free spikes
نویسندگان
چکیده
منابع مشابه
Enumerating orientations of the free spikes
We show that there are exactly 2Dk inequivalent orientations of the rank-k free spike (k ≥ 4) where Dk is the k th Dedekind number. Our proof of this result is constructive and employs the monotone boolean functions.
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ژورنال
عنوان ژورنال: European Journal of Combinatorics
سال: 2007
ISSN: 0195-6698
DOI: 10.1016/j.ejc.2005.11.004