Abstract
Groups have played a big role in knot theory. We show how subfactors (subalgebras of certain von Neumann algebras) lead to unitary representations of the braid groups and Thompson’s groups \({F}\) and \({T}\). All knots and links may be obtained from geometric constructions from these groups. And invariants of knots may be obtained as coefficients of these representations. We include an extended introduction to von Neumann algebras and subfactors.
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Baxter R.J.: Exactly solved models in statistical mechanics. Academic Press, London (1982)
Cannon J.W., Floyd W.J., Parry W.R.: Introductory notes on Richard Thompson’s groups. Enseign. Math. 42, 215–256 (1996)
Connes A.: Une classification des facteurs de type III. Ann. Sci. École Norm. Sup. (4) 6, 133–252 (1973)
Connes A.: Sur la classification des facteurs de type II. C. R. Acad. Sci. Paris Sér. A-B 281, 13–15 (1975)
Connes A.: Classification of injective factors. Cases \({{\mathrm{II}}_1}\), \({{\mathrm{II}}_\infty}\), \({{\mathrm{III}}_\lambda}\), \({\lambda \neq 1}\). Ann. of Math. (2) 104, 73–115 (1976)
A. Connes, Sur la théorie non commutative de l’intégration, In: Algèbres d’opérateurs, Lecture Notes in Math., 725, Springer-Verlag, 1979, pp. 19–143.
A. Connes, Noncommutative Geometry, Academic Press, 1994.
J.H. Conway, An enumeration of knots and links, and some of their algebraic properties, In: Computational Problems in Abstract Algebra, Proc. Conf., Oxford, 1967, Pergamon, Oxford, 1970, pp. 329–358.
D.E. Evans and Y. Kawahigashi, Quantum Symmetries on Operator Algebras, Oxford Math. Monogr., Oxford Univ. Press, 1998.
G. Golan and M. Sapir, On Jones’ subgroup of R. Thompson group \({F}\), preprint, arXiv:1501.00724.
F.M. Goodman, P. de la Harpe and V.F.R. Jones, Coxeter Graphs and Towers of Algebras, Math. Sci. Res. Inst. Publ., 14, Springer-Verlag, 1989.
Gordon C.McA., Luecke J.: Knots are determined by their complements. J. Amer. Math. Soc. 2, 371–415 (1989)
A. Guionnet, V.F.R. Jones and D. Shlyakhtenko, Random matrices, free probability, planar algebras and subfactors, In: Quanta of Maths, Clay Math. Proc., 11, Amer. Math. Soc., Providence, RI, 2010, pp. 201–239.
U. Haagerup, Principal graphs of subfactors in the index range \({4 < [M:N] < 3+\sqrt2}\), In: Subfactors, (eds. H. Araki, Y. Kawahigashi and H. Kosaki), World Sci. Publ., River Edge, NJ, 1994, pp. 1–38.
Jones V.F.R.: Index for subfactors. Invent. Math. 72, 1–25 (1983)
Jones V.F.R.: A polynomial invariant for knots via von Neumann algebras. Bull. Amer. Math. Soc. (N.S.) 12, 103–111 (1985)
V.F.R. Jones, Planar algebras I, preprint, arXiv:math/9909027.
V.F.R. Jones, The annular structure of subfactors, In: Essays on Geometry and Related Topics, Monogr. Enseign. Math., 38, Enseignement Math., Geneva, 2001, pp. 401–463.
V.F.R. Jones, Some unitary representations of Thompson’s groups F and T, preprint, arXiv:1412.7740.
Jones V.F.R., Morrison S., Snyder N.: The classification of subfactors of index at most 5. Bull. Amer. Math. Soc. (N.S.) 51, 277–327 (2014)
Kauffman L.H.: State models and the Jones polynomial. Topology 26, 395–407 (1987)
McDuff D.: Uncountably many \({{\mathrm{II}}_1}\) factors. Ann. of Math. (2) 90, 372–377 (1969)
Murray F.J., von Neumann J.: On rings of operators. Ann. of Math. (2) 37, 116–229 (1936)
Murray F.J., von Neumann J.: On rings of operators. IV. Ann. of Math. (2) 44, 716–808 (1943)
Nakamura M., Takeda Z.: A Galois theory for finite factors. Proc. Japan Acad. 36, 258–260 (1960)
A. Ocneanu, Quantized groups, string algebras and Galois theory for algebras, In: Operator Algebras and Applications. Vol. 2, London Math. Soc. Lecture Note Ser., 136, Cambridge Univ. Press, 1988, pp. 119–172.
Popa S.: An axiomatization of the lattice of higher relative commutants of a subfactor. Invent. Math. 120, 427–445 (1995)
Powers R.T.: Representations of uniformly hyperfinite algebras and their associated von Neumann rings. Ann. of Math. (2) 86, 138–171 (1967)
H.N.V. Temperley and E.H. Lieb, Relations between the “percolation” and “colouring” problem and other graph-theoretical problems associated with regular planar lattices: some exact results for the “percolation” problem, Proc. Roy. Soc. London Ser. A, 322 (1971), 251–280.
D.-V. Voiculescu, K.J. Dykema and A. Nica, Free Random Variables, CRM Monogr. Ser., 1, Amer. Math. Soc., Providence, RI, 1993.
von Neumann J.: On infinite direct products. Compositio Math. 6, 1–77 (1939)
von Neumann J.: On rings of operators. Reduction theory. Ann. of Math. (2) 50, 401–485 (1949)
Wassermann A.: Operator algebras and conformal field theory. III. Fusion of positive energy representations of \({LSU(N)}\) using bounded operators. Invent. Math. 133, 467–538 (1998)
Wenzl H.: On sequences of projections. C. R. Math. Rep. Acad. Canada 9, 5–9 (1987)
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Communicated by: Yasuyuki Kawahigashi
This article is based on the 15th Takagi Lectures that the author delivered at Tohoku University on June 27 and 28, 2015.
Vaughan Jones is supported by the NSF under Grant No. DMS-0301173.
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Jones, V.F.R. Knots, groups, subfactors and physics. Jpn. J. Math. 11, 69–111 (2016). https://doi.org/10.1007/s11537-016-1529-x
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DOI: https://doi.org/10.1007/s11537-016-1529-x