Research output: Contribution to journal › Article › peer-review
Parity, virtual closure and minimality of knotoids. / Gügümcü, N.; Kauffman, L. H.
In: Journal of Knot Theory and its Ramifications, Vol. 30, No. 11, 2150076, 01.10.2021.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Parity, virtual closure and minimality of knotoids
AU - Gügümcü, N.
AU - Kauffman, L. H.
N1 - The first author's work was supported by the Dorothea Schlozer Postdoctoral Program for Women Scientists by the University of Goettingen. The second author's work was supported by the Laboratory of Topology and Dynamics, Novosibirsk State University (contract no. 14.Y26.31.0025 with the Ministry of Education and Science of the Russian Federation). Publisher Copyright: © 2021 World Scientific Publishing Company.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - In this paper, we study parity in planar and spherical knotoids in relation to virtual knots. We introduce a planar version of the parity bracket polynomial for planar knotoids. We show that the virtual closure map (a map from the set of knotoids in S2 to the set of virtual knots of genus at most one) is not surjective, by utilizing the surface bracket polynomial of virtual knots. We give specific examples of virtual knots that are not in the image of the virtual closure map. Turaev conjectured that minimal diagrams of knot-type knotoids have zero height. We prove this conjecture by using the results of Nikonov and Manturov induced by parities of virtual knots.
AB - In this paper, we study parity in planar and spherical knotoids in relation to virtual knots. We introduce a planar version of the parity bracket polynomial for planar knotoids. We show that the virtual closure map (a map from the set of knotoids in S2 to the set of virtual knots of genus at most one) is not surjective, by utilizing the surface bracket polynomial of virtual knots. We give specific examples of virtual knots that are not in the image of the virtual closure map. Turaev conjectured that minimal diagrams of knot-type knotoids have zero height. We prove this conjecture by using the results of Nikonov and Manturov induced by parities of virtual knots.
KW - crossing number
KW - Knotoids
KW - parity
KW - virtual knots
UR - http://www.scopus.com/inward/record.url?scp=85124013054&partnerID=8YFLogxK
U2 - 10.1142/S0218216521500760
DO - 10.1142/S0218216521500760
M3 - Article
AN - SCOPUS:85124013054
VL - 30
JO - Journal of Knot Theory and its Ramifications
JF - Journal of Knot Theory and its Ramifications
SN - 0218-2165
IS - 11
M1 - 2150076
ER -
ID: 35464233