Classical homological invariants are not determined by knot Floer homology and Khovanov homology
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作者:
Cha, Jae Choon
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POSTECH, Dept Math, Pohang 790784, South Korea
Korea Inst Adv Study, Sch Math, Seoul 130722, South KoreaPOSTECH, Dept Math, Pohang 790784, South Korea
Cha, Jae Choon
[1
,2
]
Tanaka, Toshifumi
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Gifu Univ, Fac Educ, Dept Math, Yanagido 1-1, Gifu 5011193, JapanPOSTECH, Dept Math, Pohang 790784, South Korea
Tanaka, Toshifumi
[3
]
机构:
[1] POSTECH, Dept Math, Pohang 790784, South Korea
[2] Korea Inst Adv Study, Sch Math, Seoul 130722, South Korea
[3] Gifu Univ, Fac Educ, Dept Math, Yanagido 1-1, Gifu 5011193, Japan
We illustrate that there are knots for which Heegaard knot Floer homology and Khovanov homology are identical but the Alexander module and torsion invariants differ. The examples are certain symmetric unions. We also give examples of similar flavor, concerning the Kauffman and Q-polynomials in place of the classical homological invariants. This shows there are nonmutant knots with the same knot Floer and Khovanov homology.