We consider the hierarchy flats, a combinatorial generalization of flat virtual links proposed by Louis Kauffman. An approach to constructing invariants for hierarchy flats is presented; several examples are given.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-fm188-0-7,
author = {Vassily O. Manturov},
title = {Flat hierarchy},
journal = {Fundamenta Mathematicae},
volume = {185},
year = {2005},
pages = {147-154},
zbl = {1088.57009},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm188-0-7}
}
Vassily O. Manturov. Flat hierarchy. Fundamenta Mathematicae, Tome 185 (2005) pp. 147-154. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm188-0-7/