Virtual Seifert surfaces
Virtual Seifert surfaces
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虚拟 Seifert 曲面
DOI:
10.1142/s0218216519500391
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发表时间:
2017
影响因子:
0.5
通讯作者:
M. Chrisman
中科院分区:
文献类型:
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作者:
M. Chrisman
A virtual knot that has a homologically trivial representative [Formula: see text] in a thickened surface [Formula: see text] is said to be an almost classical (AC) knot. [Formula: see text] then bounds a Seifert surface [Formula: see text]. Seifert surfaces of AC knots are useful for computing concordance invariants and slice obstructions. However, Seifert surfaces in [Formula: see text] are difficult to construct. Here, we introduce virtual Seifert surfaces of AC knots. These are planar figures representing [Formula: see text]. An algorithm for constructing a virtual Seifert surface from a Gauss diagram is given. This is applied to computing signatures and Alexander polynomials of AC knots. A canonical genus of AC knots is also studied. It is shown to be distinct from the virtual canonical genus of Stoimenow–Tchernov–Vdovina.
DOI:
10.4064/fm80-9-2016
发表时间:
2015-06
期刊:
arXiv: Geometric Topology
影响因子:
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作者:
H. Boden;Robin Gaudreau;Eric Harper;Andrew J. Nicas;Lindsay White
通讯作者:
H. Boden;Robin Gaudreau;Eric Harper;Andrew J. Nicas;Lindsay White